Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
quang dung » quang trung, ung dung, cuong dung
hoc thieu » toc thieu, hoc hien
trong tac » trong cac, tuong tac, trong tan
tran chau » tranh chap, tran huu
qua dung » su dung, qua song, qua cong
tran cau » toan cau, ran cau, tra cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tung ((qua dung) OR (quang dung)) trong tac ((tran cau) OR (tran chau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh tung ((qua dung) OR (quang dung)) trong tac ((tran cau) or (tran chau))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh tung ((qua dung) OR (quang dung)) trong tac ((tran cau) or (tran chau))*.