Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phuong hoang
phung cong » nhung cong, phong cong, nhung chong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
anh tang » anh dang, anh nang, anh sang
anh bang » anh hoang, anh quang, tinh bang
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: theo chu xanh - ((anh tang) OR (anh bang)) va ((phuong cong) or (phung cong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - ((anh tang) OR (anh bang)) va ((phuong cong) OR (phung cong)) tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - ((anh tang) OR (anh bang)) va ((phuong cong) or (phung cong)) tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - ((anh tang) OR (anh bang)) va ((phuong cong) or (phung cong)) tac toan cau*.