Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
cham duc » pham duc, pham duy, phan duc
tinh hai » tinh thai, tinh chat, trinh han
sach thu » sach thieu, sach tham, cach thuc
hai cua » thai cua, dai cua, hoi cua
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
hang xa » hoang xa, hang va, hang ca

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 thu) or (sach thue)) hang xa hoi. lieu va ((cham duc) OR (cham soc)) va tinh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thue)) hang xa hoi. lieu va ((cham duc) OR (cham soc)) va tinh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) or (sach thue)) hang xa hoi. lieu va ((cham duc) OR (cham soc)) va tinh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sach thue)) hang xa hoi. lieu va ((cham duc) OR (cham soc)) va tinh hai cua tre*.