Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
trinh quan » tinh quang, trinh luat, trinh han
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh luan
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban

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

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