Perhaps you should try some spelling variations:
nhanh thi » nhanh thai, nhanh thuc, nhan tai
cua viet » ca viet, hoa viet, cua vat
duoc dat » duoc bat, duoc dai, duoc dan
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
xuc dat » duc duat, quoc dat
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma

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