Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
luong cong » dung cong, cong cong, tong cong
hoc thieu » toc thieu, hoc hien
luan dong » luan cong, quan dong, luan nong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

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 ((luan dong) or (((luong cong) OR (trong cong)))) cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tung ((luan dong) OR (((luong cong) OR (trong cong)))) cong tap toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh tung ((luan dong) or (((luong cong) OR (trong cong)))) cong tap toan ban*".