Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tung phan » trung phan, tuong phan, dung phan
phan dung » phan ung, phan dang, chan dung
dung cong » dung trong
tac trong » cay trong, hoc trong
doc hieu » toc thieu, hoc thieu, hoc hien
tac tren » rac tren, tai tren, tap tren

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 tung phan dung cong ((tac trong) or (tac tren)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh tung phan dung cong ((tac trong) OR (tac tren)) cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh tung phan dung cong ((tac trong) or (tac tren)) cau*.