Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh tai » thanh hai, thanh toan, doanh tai
thanh vai » thanh hai, thanh van, thanh oai
tang mai » tang ma, tang tai, lang mai
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
y tang » ky tang, 6 tang, 7 tang
cham o » cham soc
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: thuat sach y tang mai hoi. hieu van ((cham o) or (cam lo)) va ((thanh vai) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y tang mai hoi. hieu van ((cham o) OR (cam lo)) va ((thanh vai) OR (thanh tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach y tang mai hoi. hieu van ((cham o) or (cam lo)) va ((thanh vai) or (thanh tai)) cua tre*.