Perhaps you should try some spelling variations:
phung cong » nhung cong, phong cong, nhung chong
chu xanh » chu manh, chieu xanh, chua xang
trang va » tran van, hang va
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
cua chu » sua chua
tang va » tang van, thang va, tang vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: cua chu xanh - hanh ((tang va) or (trang va)) phung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cua chu xanh - hanh ((tang va) OR (trang va)) phung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: cua chu xanh - hanh ((tang va) or (trang va)) phung cong tac toan cau*.