Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan thong » quang thong, quan trong, xuan thong
thong cong » trong cong, tong cong, thong thong
tuan bang » tuan dang, tuan hoang, thuat bang
cong anh » cong danh, dong anh, hong anh
tuan ban » toan ban, luan ban, quang ban

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 (chiet tach)) - hanh trinh quan thong cong anh ((tuan ban) OR (tuan bang))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - hanh trinh quan thong cong anh ((tuan ban) OR (tuan bang)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (chiet tach)) - hanh trinh quan thong cong anh ((tuan ban) OR (tuan bang))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chiet tach)) - hanh trinh quan thong cong anh ((tuan ban) OR (tuan bang))*.