Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
luan chung » luan chinh
chung dang » phung dang, chuong dong, nhung lang
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dung » thanh dung, anh dung, hanh dong
dang tan » dang tran, dang toan, dang van
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (chieu tinh)) - hanh dung luan chung dang tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu tinh)) - hanh dung luan chung dang tan van ban*.