Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
giau cua » gian cua, gia cua, dieu cua
anh giau » anh giao, canh giac, anh giang
van anh » van thanh, tuan anh, van minh
cac bop » cac hop, cac lop
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
tu sach » su sach, te sach, tu cach
cac bo » bac bo, cac co

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) OR (tu sach)) ky nang xa hoi. hieu ve ((cac bo) or (cac bop)) van anh giau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang xa hoi. hieu ve ((cac bo) OR (cac bop)) van anh giau cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ky nang xa hoi. hieu ve ((cac bo) or (cac bop)) van anh giau cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ky nang xa hoi. hieu ve ((cac bo) or (cac bop)) van anh giau cua tre*.