Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cham tuc » nham thuc, pham thuc, tham thuc
cua viet » ca viet, cua vat, cua dieu
bo sach » co sach, hoc sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (bo sach)) ky nang x hoi. hieu ve cham tuc va hanh vi ((cua viet) OR (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (bo sach)) ky nang x hoi. hieu ve cham tuc va hanh vi ((cua viet) OR (hoa viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (bo sach)) ky nang x hoi. hieu ve cham tuc va hanh vi ((cua viet) OR (hoa viet))*".