Perhaps you should try some spelling variations:
thanh trung » thanh tung
tieu xanh » tieu danh, chieu xanh, dieu hanh
trung hoc » trung quoc
dung cong » dung trong
hoc dung » hoc ung, hoc dan, tac dung
dan chan » dan gian, dan ca, van chat
van tan » van tuan, van ban, van tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - thanh trung hoc dung cong ((dan chan) or (van tan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - thanh trung hoc dung cong ((dan chan) OR (van tan)) cao*.