Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
tuan duong » tuyen duong, tuong duong, van duong
hoc thieu » toc thieu, hoc hien
tuan dong » luan dong, tran dong, tuan dang
quan dong » quang dong, quan long, quan hoang
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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: hoc thieu xanh - thanh tung ((((tuan dong) OR (quan dong))) or (tuan duong)) cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tung ((((tuan dong) OR (quan dong))) OR (tuan duong)) cong tap toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh tung ((((tuan dong) OR (quan dong))) or (tuan duong)) cong tap toan cao*".