Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
thu sach » tu sach, thuat sach, thuoc sach
tang mai » tang ma, tang tai, sang mai
lang mai » lang dai, lang hai, lang man
cham lo » cham o, cham soc, cham hoi
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
cam lo » nam lo, cam ly, cam o

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 y ((tang mai) OR (lang mai)) hoi. hieu ve ((cham lo) or (cam lo)) ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((tang mai) OR (lang mai)) hoi. hieu ve ((cham lo) OR (cam lo)) ban thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((tang mai) OR (lang mai)) hoi. hieu ve ((cham lo) or (cam lo)) ban thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((tang mai) OR (lang mai)) hoi. hieu ve ((cham lo) or (cam lo)) ban thanh vai cua tre*.