Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
tay dung » xay dung, tac dung, tay nung
tinh hai » tinh thai, tinh chat, trinh han
tay lang » tai lang, tay tang, tay quang
xay hoi » xa hoi, tay hoi, cay phoi
hieu he » hieu ve, hiem he, hieu le
va tinh » may tinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
he nam » ha nam, nghe 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) OR (thuoc sach)) ((tay lang) or (tay dung)) xay hoi. hieu he nam tu va tinh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ((tay lang) OR (tay dung)) xay hoi. hieu he nam tu va tinh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) ((tay lang) or (tay dung)) xay hoi. hieu he nam tu va tinh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) ((tay lang) or (tay dung)) xay hoi. hieu he nam tu va tinh hai cua tre*.