Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
va danh » va dinh, va dan, va hanh
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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

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