Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
trinh chua » trinh cua, trinh chu, tinh chua
hoc thieu » toc thieu, hoc hien
dong cong » duong cong, dung cong, dang cong
ho chieu » theo chieu, doi chieu, mot chieu
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) tinh - hanh ((trinh chua) OR (trinh chuan)) dong cong dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) tinh - hanh ((trinh chua) OR (trinh chuan)) dong cong dan than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) tinh - hanh ((trinh chua) OR (trinh chuan)) dong cong dan than man".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) tinh - hanh ((trinh chua) OR (trinh chuan)) dong cong dan than man*.