Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
nong cong » cong cong, tong cong, nang cong
cua nong » cua cong, cuu nong, cua dong
cong van » cong vang, cong san, song van
quan tap » quan tai, quan tam, quan tay
quan lap » quan luan, quang lam, quan lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (chieu sang)) - hanh trinh cua nong cong van ((quan tap) or (quan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu sang)) - hanh trinh cua nong cong van ((quan tap) OR (quan lap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chieu sang)) - hanh trinh cua nong cong van ((quan tap) or (quan lap))*.