Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh van » tran van, trinh van, thanh van
van hung » van dung, manh hung, van duong
cong dan » cong san, cong tan, huong dan
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 thiet tach - canh tranh van hung ((cong dan) or (cong thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - canh tranh van hung ((cong dan) OR (cong thanh)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - canh tranh van hung ((cong dan) or (cong thanh)) toan ban*.