Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu sang » chieu sach, chieu xanh, hieu lang
khanh cong » thanh cong, hanh cong, khach cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trong van » trong cac
van khanh » van thanh, van hanh, van anh
cong tac » cong ty
tac dan » tac danh, cac dan, tac da

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 manh) OR (chieu sang)) - thanh trong van khanh cong tac dan ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) OR (chieu sang)) - thanh trong van khanh cong tac dan ca".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) OR (chieu sang)) - thanh trong van khanh cong tac dan ca*.