Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, kieu tinh
hanh trung » thanh trung, hanh trang, manh trung
trung hanh » trung thanh, trung khanh, trung anh
hanh trong » hanh trang, anh trong, hinh trong
cong tan » cong tac, cong san, cong thanh
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: hoc ((chieu tinh) or (trieu tinh)) - hanh trung hanh trong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (trieu tinh)) - hanh trung hanh trong cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (trieu tinh)) - hanh trung hanh trong cong tan van ban*.