Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
qua trong » quan trong, qua trinh, qua song
hoc hieu » hoc thieu, hoc hien, doc hieu
co trong » cong trong, cay trong, dot trong
ro trong » dot trong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - canh tranh ((((co trong) or (ro trong))) or (qua trong)) cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh tranh ((((co trong) OR (ro trong))) OR (qua trong)) cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh tranh ((((co trong) or (ro trong))) or (qua trong)) cong van toan ban*.