Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thong cong » trong cong, tong cong, thong thong
hieu lang » hieu quang, nhieu tang, hieu van
tran van » luan van
cong tam » cong tac, cong tan, cong nam
tam than » ban than
than cap » khan cap, thanh lap, thanh cac
lan van » luan van, lang van, tan 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 ((chieu sang) or (hieu lang)) - hanh ((tran van) or (lan van)) thong cong tam than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - hanh ((tran van) OR (lan van)) thong cong tam than cap.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - hanh ((tran van) or (lan van)) thong cong tam than cap*.