Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham tuc » nham thuc, pham thuc, tham thuc
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
ky tang » ky dang, kho tang, ky trong
va cham » va chat, va tham
va danh » va dinh, va dan, va hanh
danh ki » danh di, danh kien, danh gia
tuc va » thuc va, truc va, tuc xa
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuoc sach)) ((ky tang) OR (ky nang)) xa hoi. lieu va cham tuc va danh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ((ky tang) OR (ky nang)) xa hoi. lieu va cham tuc va danh ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuoc sach)) ((ky tang) OR (ky nang)) xa hoi. lieu va cham tuc va danh ki su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ((ky tang) OR (ky nang)) xa hoi. lieu va cham tuc va danh ki su triet*.