Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, mot chieu
tang luan » dung luan
ho chieu » theo chieu, hoc thieu, mot chieu
tang cua » mang cua, hang cua, thong cua
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - hanh ((tang cua) OR (tang luan)) nhung cong tan tran tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) xanh - hanh ((tang cua) or (tang luan)) nhung cong tan tran tap~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) xanh - hanh ((tang cua) or (tang luan)) nhung cong tan tran tap*.