Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
cap cang » cap bang, cap hoang, tap cong
nong dan » cong dan, nong san, nguong dan
toan cao » toan tap
toan ban » van ban
cap can » cap han, cap van, tap can

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - thanh trung ((cap cang) or (cap can)) nong dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung ((cap cang) OR (cap can)) nong dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh trung ((cap cang) or (cap can)) nong dan ((toan cao) or (toan ban))*.