Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh hinh » hanh chinh, hanh tinh, hanh dinh
nho hieu » nha hieu, nho sieu, nhu hieu
hinh cua » chinh cua, sinh cua, tinh cua
nong san » dong san, nong dan, trong san
cong san » cong tac
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap

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

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