Perhaps you should try some spelling variations:
hien manh » hien hanh, tien manh, hieu manh
qua trong » quan trong, qua song, qua cong
qua trinh » qua kinh
ca trong » cay trong, cad trong, co trong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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

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