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
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
phan cac » nhan cach, phan dau, phan lap

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)) dung cong dan ((phan cac) OR (phan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - hanh ((trinh cua) OR (trinh quan)) dung cong dan ((phan cac) or (phan tu))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh ((trinh cua) OR (trinh quan)) dung cong dan ((phan cac) or (phan tu))*.