Perhaps you should try some spelling variations:
hanh tung » thanh tung, manh tung, hanh dung
cong cong » cong dong, trong cong, dung cong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
anh tang » anh bang, anh dang, anh nang
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan

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 - ((hanh tung) or (anh tang)) cua cong cong ((tac toan) OR (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - ((hanh tung) OR (anh tang)) cua cong cong ((tac toan) OR (tap toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - ((hanh tung) or (anh tang)) cua cong cong ((tac toan) OR (tap toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - ((hanh tung) or (anh tang)) cua cong cong ((tac toan) OR (tap toan)) cau*.