Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dia danh » dia ban, gia dinh
tao nhan » ca nhan, tue nhan, tri nhan
cao nhan » ca nhan, cam nhan, cac nhan
sach ky » sac ky, sach y, sach ty
va tinh » may tinh
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu ((cao nhan) OR (tao nhan)) thuc ((dia danh) or (va tinh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ((cao nhan) OR (tao nhan)) thuc ((dia danh) OR (va tinh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu ((cao nhan) OR (tao nhan)) thuc ((dia danh) or (va tinh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ((cao nhan) OR (tao nhan)) thuc ((dia danh) or (va tinh)) dai cua tre*.