Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh trong » tranh trong, hanh trong, nhanh trong
hieu xanh » chieu xanh, hieu manh, hieu nganh
nam nhung » cam nhung, tham nhung, va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap

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 xanh - ((thanh trong) OR (thanh trung)) nam nhung ((cong tan) or (cong trinh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((thanh trong) OR (thanh trung)) nam nhung ((cong tan) OR (cong trinh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((thanh trong) OR (thanh trung)) nam nhung ((cong tan) or (cong trinh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((thanh trong) OR (thanh trung)) nam nhung ((cong tan) or (cong trinh)) toan cao*.