Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hach toan » thanh toan, manh toan
theo chu » theo chieu, cho chu, chao chu
chu tach » chu tich, chu thich, chu thanh
va thong » va thuong, va phuong, he thong
tac toan » tap toan, tam toan, tich toan
anh ban » anh bang, anh bai, anh van

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 tach - anh ban va thong cong ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu tach - anh ban va thong cong ((tac toan) OR (hach toan)) cau.
• Adding a wildcard symbol may retrieve word variants: theo chu tach - anh ban va thong cong ((tac toan) or (hach toan)) cau*.