When you need to maximize the results of a topical search, the identification and usage of synonyms is essential. See search example below.
Search example: Research on the impact of trust in global online teams
Often you'll find that searching for terms opposite to your concept will richly inform your understanding of the research.
The impact of leadership style on employee job satisfaction.
leadership style AND
satisfaction OR dissatisfaction or motivation OR turnover OR retention OR loyalty OR disgruntled OR productivity OR thrive
Bringing contrasting literature, in other words, articles where authors point out weaknesses and limitations of theories you're using in your manuscript, will significantly strengthen your scholarly voice. You demonstrate that you have considered many perspectives about theories you're utilizing in your research, and are able to speak to their advantages as well as limitations.