Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
va thanh » gia thanh, ban thanh, va tinh
ban hanh » ban hang
su triet » su viet, su tien, ve triet
van nang » van quang, van ban, van dong
hoc sach » hoc sinh, hoc cac, hoc anh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
de su » den su, ve su, de tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) van nang xa hoi. hieu va cac luc ((ban hanh) or (va thanh)) de su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) van nang xa hoi. hieu va cac luc ((ban hanh) OR (va thanh)) de su triet.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) van nang xa hoi. hieu va cac luc ((ban hanh) or (va thanh)) de su triet*.