Perhaps you should try some spelling variations:
sang mai » sang ma, sang tai, lang mai
van chat » cao chat
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
mai hoi » mai khoi, dai hoi, lai hoi
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh

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 ty sang mai hoi. hieu ((va cham) or (van chat)) duc va hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty sang mai hoi. hieu ((va cham) OR (van chat)) duc va hanh lai chau tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty sang mai hoi. hieu ((va cham) or (van chat)) duc va hanh lai chau tre*.