Perhaps you should try some spelling variations:
hien tinh » khien tinh, thien tinh, bien tinh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan hung » luan chung, lan hung, luan ung
hung cong » nhung cong, hung cuong, phung cong
cong san » cong tac
tran ban » tranh ban, toan ban, tran bai
tran 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 hien tinh - hanh tang luan hung cong san ((tran ban) or (tran van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - hanh tang luan hung cong san ((tran ban) OR (tran van)).
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - hanh tang luan hung cong san ((tran ban) or (tran van))*.