Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
ban hanh » ban hang
lang van » tang van, hoang van, giang van
dang van » hoang van, hang va
tu sach » thu sach, su sach, te sach
hai cua » thai cua, dai cua, hoi cua
cuc ban » cua ban, cac ban, cuu ban
cac cuc » cac cuoc, cac cua, cac nuoc
qua cac » cua cac
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: tu sach y ((nang xa) or (((lang van) OR (dang van)))) hoi. hieu qua cac cuc ban hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (((lang van) OR (dang van)))) hoi. hieu qua cac cuc ban hanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (((lang van) OR (dang van)))) hoi. hieu qua cac cuc ban hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (((lang van) OR (dang van)))) hoi. hieu qua cac cuc ban hanh hai cua tre*.