Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
dung cong » dung trong
hang tai » hang va, dung tai
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
hang ca » hang va, nang cao, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - anh ((hang ca) or (hang tai)) dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - anh ((hang ca) OR (hang tai)) dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - anh ((hang ca) or (hang tai)) dung cong tac toan cau*.