Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
chinh cua » chinh ca, hinh cua, chinh luan
chinh sua » chinh su, chinh luan, hinh su
dang nong » dang cong, hang nong, tang nong
hieu van » hieu va, thien van, lieu va
nong dan » cong dan, nong san, nguong dan
dan toan » van toan, dan than, manh toan
toan cau » 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: ho ((hieu van) or (nhieu tang)) - hanh ((chinh cua) or (chinh sua)) dang nong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu van) OR (nhieu tang)) - hanh ((chinh cua) OR (chinh sua)) dang nong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu van) or (nhieu tang)) - hanh ((chinh cua) or (chinh sua)) dang nong dan toan cau*.