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
trinh qua » trinh quan, trinh cua, trinh quang
dung cong » dung trong
qua dung » quang dung, su dung, qua song
san nhan » van nhan, sat nhan, san nhat
ban nhan » van nhan, ban thanh, benh nhan
ban than » ban thanh, van thanh, ban hang

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