Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
trinh chua » trinh chuan, trinh cua, trinh chu
chua bang » chu bang, chua nang, chua xang
bang cong » dang cong, bang song, hang cong
tan van » tran van, tang van, luan van
lan van » luan van, lang van, san van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dieu hanh) or (chieu xanh)) - hanh trinh chua bang cong ((tan van) or (lan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (chieu xanh)) - hanh trinh chua bang cong ((tan van) OR (lan van)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (chieu xanh)) - hanh trinh chua bang cong ((tan van) or (lan van)) ban*.