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 » xay dung, tac dung, tay nung
hieu van » hieu va, thien van, lieu va
minh hai » minh khai, tinh hai, manh hai
xay hoi » xa hoi, tay hoi, cay phoi
va minh » van minh, vua minh, va kinh
hai chu » hai chau, hoi chu, hai chi
chu tre » cho tre, chu tri, cuu tre
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)) xay hoi. hieu van nam tu va minh hai chu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((tay lang) OR (tay dung)) xay hoi. hieu van nam tu va minh hai chu tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((tay lang) or (tay dung)) xay hoi. hieu van nam tu va minh hai chu tre*.