Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
khanh vi » hanh vi, khanh v, nhanh vi
thu sach » thuat sach, thuoc sach, thu hoach
cao xuc » cam xuc, cao suc, chat xuc
cao duc » dao duc, cao suc, giao duc
tu sach » su sach, te sach, tu cach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di cua

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 (thu sach)) ky nang xa hoi. hieu va ((cao xuc) OR (cao duc)) duy khanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang xa hoi. hieu va ((cao xuc) OR (cao duc)) duy khanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang xa hoi. hieu va ((cao xuc) OR (cao duc)) duy khanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang xa hoi. hieu va ((cao xuc) OR (cao duc)) duy khanh vi cua viet*.