Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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 - ((hanh tang) or (canh tranh)) ((cua dung) or (cua dong)) cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((hanh tang) OR (canh tranh)) ((cua dung) OR (cua dong)) cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh tang) or (canh tranh)) ((cua dung) or (cua dong)) cong tac toan cao*.