Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
thanh phan » thanh pho, thanh san, thanh toan
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
thanh hai » thanh hoa, thanh san
doi hieu » doi chieu, doc hieu, doi hien
nong ban » nong dan, dong ban, nong van
nong san » cong san, dong san, nong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - hanh tranh cua nhung ((nong ban) OR (nong san)) ((thanh hai) or (thanh phan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh tranh cua nhung ((nong ban) OR (nong san)) ((thanh hai) OR (thanh phan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - hanh tranh cua nhung ((nong ban) OR (nong san)) ((thanh hai) or (thanh phan))".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh tranh cua nhung ((nong ban) OR (nong san)) ((thanh hai) or (thanh phan))*.