Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
quang dung » quang trung, ung dung, cuong dung
hieu manh » hieu nganh, dieu hanh, hien hanh
anh trong » anh thuong, dinh trong, lang trong
dung cong » dung trong
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: doc ((hieu manh) OR (chieu xanh)) - ((thanh trung) or (anh trong)) quang dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (chieu xanh)) - ((thanh trung) OR (anh trong)) quang dung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) OR (chieu xanh)) - ((thanh trung) or (anh trong)) quang dung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) OR (chieu xanh)) - ((thanh trung) or (anh trong)) quang dung cong tac toan cau*.