Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
trinh qua » trinh quan, trinh quang, trinh luat
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
san nhan » van nhan, sat nhan, san nhat
ban nhan » ban than, van nhan, ban thanh

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 - canh ((trinh qua) OR (trinh cua)) dung cong ((san nhan) or (ban nhan)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - canh ((trinh qua) OR (trinh cua)) dung cong ((san nhan) OR (ban nhan)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - canh ((trinh qua) OR (trinh cua)) dung cong ((san nhan) or (ban nhan)) tu".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh ((trinh qua) OR (trinh cua)) dung cong ((san nhan) or (ban nhan)) tu*.