Perhaps you should try some spelling variations:
sach tham » sach nha
sach tai » sach bai, sach dao, sach xa
minh hai » minh khai, tinh hai, manh hai
hai cua » thai cua, dai cua, hoi cua
va minh » van minh, vua minh, va kinh
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
ve cai » va cai, ve cac, ve tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach tai) OR (sach tham)) lang xa hoi. hieu ((ve cai) or (va cam)) xuc va minh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tai) OR (sach tham)) lang xa hoi. hieu ((ve cai) OR (va cam)) xuc va minh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tai) OR (sach tham)) lang xa hoi. hieu ((ve cai) or (va cam)) xuc va minh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tai) OR (sach tham)) lang xa hoi. hieu ((ve cai) or (va cam)) xuc va minh hai cua tre*.