Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
su triet » su tien, ve triet
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
van hoc » van hoa
hoc tuc » hoc thuc, hoc truc, hoc tu
xa hanh » xa thanh, xa khanh, va hanh
su viet » so viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky ((nang x) or (lang xa)) hoi. hieu van hoc tuc xa hanh vai ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((nang x) OR (lang xa)) hoi. hieu van hoc tuc xa hanh vai ((su triet) OR (su viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((nang x) or (lang xa)) hoi. hieu van hoc tuc xa hanh vai ((su triet) OR (su viet))*".