Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong cong » tong cong, thong thong, phong chong
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
trung va » truong va, trang va, trung ha
dan chan » dan gian, dan ca, van chat
chan cao » chan cho, chat cao, chay cao

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 trung va ((thong cong) or (trong cong)) dan chan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh trung va ((thong cong) OR (trong cong)) dan chan cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh trung va ((thong cong) or (trong cong)) dan chan cao*.