Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chau tinh » cuu tinh, ha tinh, cua tinh
cua sinh » hoa sinh, va sinh
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: o ((chau tinh) or (cua sinh)) - canh ((tranh va) or (trinh va)) thong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: o ((chau tinh) OR (cua sinh)) - canh ((tranh va) OR (trinh va)) thong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: o ((chau tinh) or (cua sinh)) - canh ((tranh va) or (trinh va)) thong cong tac toan cau*.