Perhaps you should try some spelling variations:
hieu tinh » chieu tinh, lieu tinh, kieu tinh
hanh tran » hanh trang, thanh tran, hanh tram
van trong » van truong, vang trong, ban trong
doc hieu » toc thieu, hoc thieu, hoc hien
tran van » luan van
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tai » doanh tai, toan ban, von tai
toan tap » toan ban

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 tinh - hanh tran van trong cong dan ((((toan cao) or (toan tai))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - hanh tran van trong cong dan ((((toan cao) OR (toan tai))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - hanh tran van trong cong dan ((((toan cao) or (toan tai))) or (toan tap))*.