Perhaps you should try some spelling variations:
chon nhiem » chon chien, phoi nhiem
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
hoi nhiem » phoi nhiem, thai nhiem, o nhiem
trang va » tran van
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoi nhiem) OR (chon nhiem)) tang - hanh ((trang va) or (hang va)) nhung cong thanh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoi nhiem) OR (chon nhiem)) tang - hanh ((trang va) OR (hang va)) nhung cong thanh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoi nhiem) OR (chon nhiem)) tang - hanh ((trang va) or (hang va)) nhung cong thanh toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoi nhiem) OR (chon nhiem)) tang - hanh ((trang va) or (hang va)) nhung cong thanh toan ban*.