Perhaps you should try some spelling variations:
trung tuan » trung thanh, tran tuan, truong thanh
hieu sang » chieu sang, hieu lang, hieu quang
hang nong » thang long, han tong
doc hieu » toc thieu, hoc thieu, hoc hien
nong van » song van, nong dan, nong san
van toan » van tuan, van tan, van thanh
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: doc hieu sang - thanh ((trung tuan) or (trung tam)) hang nong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - thanh ((trung tuan) OR (trung tam)) hang nong van toan cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - thanh ((trung tuan) or (trung tam)) hang nong van toan cao*.