Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tay lang » tai lang, tay tang, tay quang
manh hai » lanh hai, minh hai, thanh hai
tay dung » xay dung, tac dung, tay nung
hai cua » thai cua, dai cua, hoi cua
va manh » van manh, va danh, va hanh
cua tre » cua te, cuu tre, cua triet
xay hoi » xa hoi, tay hoi, cay phoi
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, va cam, ve cai

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