Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
hoc thieu » toc thieu, hoc hien
toan tap » toan ban
mang va » mang vua, hang va, dang va
bang va » hang va, ban va, trang va

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

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