Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
trinh chua » trinh cua, trinh chu, tinh chua
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
dong cong » duong cong, dung cong, dang cong
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
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: ((doi chieu) or (hoc thieu)) tinh - hanh ((trinh chua) or (trinh chuan)) dong cong ban than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) tinh - hanh ((trinh chua) OR (trinh chuan)) dong cong ban than man.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc thieu)) tinh - hanh ((trinh chua) or (trinh chuan)) dong cong ban than man*.