Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
trinh su » trinh tu, trinh san, trinh cau
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 su 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 su dung cong ((san nhan) OR (ban nhan)) tu.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh trinh su dung cong ((san nhan) or (ban nhan)) tu*.