Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doc hieu » toc thieu, hoc thieu, hoc hien
chao chu » cho chu, cua chu, cao cho
cong dan » cong san, cong tan, huong dan
than tap » toan tap, han tap, than cap
phan tap » phan lap, han tap, pha tap
mang va » mang vua, hang va, bang va

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 (chao chu)) xanh - cach mang va nhung cong dan ((than tap) OR (phan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (chao chu)) xanh - cach mang va nhung cong dan ((than tap) OR (phan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (chao chu)) xanh - cach mang va nhung cong dan ((than tap) OR (phan tap))".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (chao chu)) xanh - cach mang va nhung cong dan ((than tap) OR (phan tap))*.