Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
vien nganh » vien thanh
hanh trinh » canh tranh, hanh chinh
bang trong » lang trong, ban trong, nang trong
mang trong » lang trong, mang thong, nang trong
trinh cap » trinh cau, trinh lap, trinh cac
van toan » van tuan, van tan, van thanh
toan ban » van 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 (vien nganh)) - hanh trinh cap ((bang trong) OR (mang trong)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (vien nganh)) - hanh trinh cap ((bang trong) OR (mang trong)) van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (vien nganh)) - hanh trinh cap ((bang trong) OR (mang trong)) van toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (vien nganh)) - hanh trinh cap ((bang trong) OR (mang trong)) van toan ban*.