Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
xa trong » xa truong, ca trong, va trong
doi cua » dai cua, hoi cua
va chat » van chat, va phat, cao chat
va cham » va tham
cach tu » cach thuc
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach thu) or (cach tu)) nang x hoi. hieu ((va cham) OR (va chat)) tuc xa trong doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach thu) OR (cach tu)) nang x hoi. hieu ((va cham) OR (va chat)) tuc xa trong doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach thu) or (cach tu)) nang x hoi. hieu ((va cham) OR (va chat)) tuc xa trong doi cua tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach thu) or (cach tu)) nang x hoi. hieu ((va cham) OR (va chat)) tuc xa trong doi cua tre*.