Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
nhanh lang » nhanh quang, nhanh thang, nhan dang
hanh tung » thanh tung, manh tung, hanh dung
dung cong » dung trong
ho chieu » hoc thieu, doi chieu, mot chieu
cua dung » cua dang, cua dong, qua dung
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) OR (ho chieu)) xanh - ((hanh tung) or (nhanh lang)) cua dung cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) xanh - ((hanh tung) OR (nhanh lang)) cua dung cong tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) xanh - ((hanh tung) or (nhanh lang)) cua dung cong tap toan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) xanh - ((hanh tung) or (nhanh lang)) cua dung cong tap toan ban*.