Perhaps you should try some spelling variations:
trinh tieng » trinh tin, trinh dien
chieu sang » chieu sach, chieu xanh, hieu lang
dong quang » duong quang, dang quang, dung quang
tieng phap » tieng han, tieng nhat, bien phap
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, mot chieu
anh dong » anh huong, anh son

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 - anh dong quang ((hang cong) or (dang cong)) trinh tieng phap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - anh dong quang ((hang cong) OR (dang cong)) trinh tieng phap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - anh dong quang ((hang cong) or (dang cong)) trinh tieng phap*.