Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tay lang » tai lang, tay tang, tay quang
tay dung » tac dung, tay nung, tay vung
minh hai » minh khai, tinh hai, manh hai
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
va minh » van minh, vua minh, va kinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ve nam » he nam, va nam, le nam
nam tu » nam thu, nam thuc

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 ((tay lang) or (((tay dung) OR (xay dung)))) xay hoi. hieu ve nam tu va minh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((tay lang) OR (((tay dung) OR (xay dung)))) xay hoi. hieu ve nam tu va minh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((tay lang) or (((tay dung) OR (xay dung)))) xay hoi. hieu ve nam tu va minh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((tay lang) or (((tay dung) OR (xay dung)))) xay hoi. hieu ve nam tu va minh hai cua tre*.