Perhaps you should try some spelling variations:
thanh trung » thanh tung
quang trung » truong trung
thieu xanh » chieu xanh, hieu manh, thien anh
quang dung » ung dung, cuong dung
hoc thieu » toc thieu, hoc hien
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » 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 trung ((quang dung) OR (quang trung)) cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh trung ((quang dung) OR (quang trung)) cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh trung ((quang dung) OR (quang trung)) cong tac toan cau*.