Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
trong van » trong cac
trong san » trong cac, cong san, dong san
trung va » truong va, trang va, trung ha
san toan » van toan, dan toan, manh toan
toan ban » van ban

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 tinh - thanh ((trung va) or (trong van)) dung trong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - thanh ((trung va) OR (trong van)) dung trong san toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - thanh ((trung va) or (trong van)) dung trong san toan ban*.