Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
qua trinh » qua kinh
hoc hieu » hoc thieu, hoc hien, doc hieu
co trong » ro trong, cong trong, cay trong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai 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 hieu nganh - canh tranh ((co trong) or (qua trinh)) cong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - canh tranh ((co trong) OR (qua trinh)) cong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - canh tranh ((co trong) or (qua trinh)) cong tap toan cau*.