Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tuan duong » tuyen duong, tuong duong, van duong
hieu sang » chieu sang, hieu lang, hieu quang
tuan dung » tran dung, tan dung, tuan dang
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
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: doc hieu sang - hanh trinh ((tuan dung) or (tuan duong)) cong dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - hanh trinh ((tuan dung) OR (tuan duong)) cong dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - hanh trinh ((tuan dung) or (tuan duong)) cong dan ((toan cao) or (toan ban))*.