Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thi chieu » thi chien, thi hieu, theo chieu
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cam » phan cac, phan cau, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (((ho chieu) or (thi chieu)))) xanh - canh tranh va nhung cong tan phan cam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (((ho chieu) OR (thi chieu)))) xanh - canh tranh va nhung cong tan phan cam.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (((ho chieu) or (thi chieu)))) xanh - canh tranh va nhung cong tan phan cam*.