Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
hang nong » thang long, han tong
doc hieu » toc thieu, hoc thieu, hoc hien
trung va » truong va, trang va, trung cap
trung ha » trung hoc, trung cap
nong dan » cong dan, nong san, nguong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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 xanh - thanh ((((trung va) or (trung tam))) or (trung ha)) hang nong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh ((((trung va) OR (trung tam))) OR (trung ha)) hang nong dan than cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh ((((trung va) or (trung tam))) or (trung ha)) hang nong dan than cao*.