Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
tinh va » tich va, trinh van, trinh vat
tinh vi » trinh vi, tinh voi, dinh vi
cua tre » cua te, cuu tre, cua triet
cam cuc » cham cuu, pham cuc
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh

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 dang xa hoi. hieu ve ((cam cuc) or (cam xuc)) ban ((tinh vi) OR (tinh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ve ((cam cuc) OR (cam xuc)) ban ((tinh vi) OR (tinh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu ve ((cam cuc) or (cam xuc)) ban ((tinh vi) OR (tinh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ve ((cam cuc) or (cam xuc)) ban ((tinh vi) OR (tinh va)) cua tre*.