Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
hoc chieu » hoc thieu, ho chieu, hoc hien
bang song » nang song
than ban » thanh ban, toan ban, nhuan ban
than man » than ma, thanh san, tran manh

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 chieu tinh - hanh trinh quan ((thanh cong) OR (bang song)) dan ((than ban) OR (than man))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu tinh - hanh trinh quan ((thanh cong) or (bang song)) dan ((than ban) OR (than man))~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - hanh trinh quan ((thanh cong) or (bang song)) dan ((than ban) OR (than man))*.