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