Perhaps you should try some spelling variations:
hien khang » hien khanh, chien thang, thieu khang
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
cong san » cong tac
toan cau » toan cao, toan ban
toan tai » doanh tai, toan ban, toan cao
toan tap » toan ban
va dung » van dung, va duong, vat dung

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 khang - canh tranh va dung cong san ((((toan cau) or (toan tai))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien khang - canh tranh va dung cong san ((((toan cau) OR (toan tai))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien khang - canh tranh va dung cong san ((((toan cau) or (toan tai))) or (toan tap))*.