Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu sang » chieu sach, chieu xanh, hieu lang
khong song » khong dong, khong mong, khong xuong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh cua » tinh cua, trinh luat, trinh quan
cua khong » hua khong, cua phuong, cua thuong
van thanh » ban thanh, van tuan
van toan » van tuan, van tan, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (chieu sang)) - hanh trinh cua khong song ((van toan) OR (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (chieu sang)) - hanh trinh cua khong song ((van toan) OR (van thanh)) cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) or (chieu sang)) - hanh trinh cua khong song ((van toan) OR (van thanh)) cao*".