Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
cong quang » luong quang, thong quang, duong quang
cong ngang » cong nhan, cong lang, cong nong
hoc thieu » toc thieu, hoc hien
tuan cao » toan cao, juan cao, quang cao
tung va » trung va, tuong va, dung va
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - thanh tung va hang ((cong quang) or (cong ngang)) tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tung va hang ((cong quang) OR (cong ngang)) tuan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh tung va hang ((cong quang) or (cong ngang)) tuan cao*.