Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu sang » chieu sang, tiem nang, tinh sang
tieu dung » dieu duong, tin dung, viet dung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
mang va » mang vua, bang va, dang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tieu sang) or (tieu dung)) - hang ((mang va) OR (hang va)) nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sang) OR (tieu dung)) - hang ((mang va) OR (hang va)) nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sang) or (tieu dung)) - hang ((mang va) OR (hang va)) nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sang) or (tieu dung)) - hang ((mang va) OR (hang va)) nhung cong tac toan cau*.