Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
dang trong » dong trong, lang trong, dang trung
ho chieu » theo chieu, hoc thieu, doi chieu
tung cap » trung cap, cung cap, thong cap
bai toan » bai tap
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: ho chieu sach - thanh tung cap ((dang trong) or (dung trong)) bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh tung cap ((dang trong) OR (dung trong)) bai toan ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh tung cap ((dang trong) or (dung trong)) bai toan ban*.