Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, ha tinh, cua tinh
hanh ban » thanh ban, hang ban, hanh han
hanh san » thanh san, khach san, thanh son
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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 ((chau tinh) or (trieu tinh)) - ((hanh ban) OR (hanh san)) va nhung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chau tinh) OR (trieu tinh)) - ((hanh ban) OR (hanh san)) va nhung cong tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chau tinh) or (trieu tinh)) - ((hanh ban) OR (hanh san)) va nhung cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chau tinh) or (trieu tinh)) - ((hanh ban) OR (hanh san)) va nhung cong tac toan ban*.