Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
thang va » trang va, thong va, thanh va
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (chieu tinh)) - cang ((thang va) or (hang va)) thong cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (chieu tinh)) - cang ((thang va) OR (hang va)) thong cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (chieu tinh)) - cang ((thang va) or (hang va)) thong cong tac toan tap*.