Perhaps you should try some spelling variations:
truong cua » truong ca, truong quan, huong cua
truong cao » truong dai
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu va - hanh ((truong cua) or (truong cao)) dung cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu va - hanh ((truong cua) OR (truong cao)) dung cong dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doc hieu va - hanh ((truong cua) or (truong cao)) dung cong dan ((toan cao) or (toan tap))*.