Perhaps you should try some spelling variations:
thanh rong » thanh cong, thanh long, thanh hong
hieu sang » chieu sang, hieu lang, hieu quang
rong hoat » trong hoat, dong hoa, cong hoa
dong cong » duong cong, dung cong, dang cong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran ban » tranh ban, tran van, toan 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 - thanh rong hoat dong cong tac tran ban~.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - thanh rong hoat dong cong tac tran ban*.