Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
va cam » va cham, va cao, va cai
tuc va » thuc va, truc va, tuc xa
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 (tu sach)) ky nang xa hoi. lieu ((va cam) OR (va cac)) tuc va hanh de cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (tu sach)) ky nang xa hoi. lieu ((va cam) OR (va cac)) tuc va hanh de cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (tu sach)) ky nang xa hoi. lieu ((va cam) OR (va cac)) tuc va hanh de cua viet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (tu sach)) ky nang xa hoi. lieu ((va cam) OR (va cac)) tuc va hanh de cua viet*.