Perhaps you should try some spelling variations:
va phuong » cac phuong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
anh hang » anh hoang, anh hung, anh bang
dong tac » cong tac, dong tai, dong bac
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 hang ((va phuong) OR (va thuong)) dong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - anh hang ((va phuong) OR (va thuong)) dong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - anh hang ((va phuong) OR (va thuong)) dong tac toan cau*.