Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
manh hai » lanh hai, minh hai, thanh hai
sach tay » xach tay, sach hay, sach nay
hai cua » thai cua, dai cua, hoi cua
va manh » van manh, va danh, va hanh
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
lang xa » dang xay, lang van
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, 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 xa) or (lang ha)) hoi. hieu ((ve cam) or (va cam)) luc va manh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tay ((lang xa) OR (lang ha)) hoi. hieu ((ve cam) OR (va cam)) luc va manh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach tay ((lang xa) or (lang ha)) hoi. hieu ((ve cam) or (va cam)) luc va manh hai cua tre*.