Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doi chi, ho chieu, mot chieu
canh manh » lanh manh, canh tranh, cach mang
doc hieu » toc thieu, hoc thieu, hoc hien
cong ban » cong bang, cong san, cong tan
thang tu » thong tu, hang tu, tang tu
thanh tu » hanh tu, nhanh tu, thanh tung
manh va » hanh va, anh va, minh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doc hieu)) xanh - canh manh va nhung cong ban ((thang tu) or (thanh tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - canh manh va nhung cong ban ((thang tu) OR (thanh tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) xanh - canh manh va nhung cong ban ((thang tu) or (thanh tu))".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) xanh - canh manh va nhung cong ban ((thang tu) or (thanh tu))*.