Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
tang mai » tang ma, tang tai, lang mai
vai cua » dai cua, hai cua, lai cua
cham lo » cham o, cham soc, cham hoi
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va
cua tre » cua te, cuu tre, cua triet
y tang » ky tang, 6 tang, 7 tang
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: tu sach y tang mai hoi. ((hieu ve) OR (hieu van)) ((cham lo) or (cam lo)) gia thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y tang mai hoi. ((hieu ve) OR (hieu van)) ((cham lo) OR (cam lo)) gia thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y tang mai hoi. ((hieu ve) OR (hieu van)) ((cham lo) or (cam lo)) gia thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y tang mai hoi. ((hieu ve) OR (hieu van)) ((cham lo) or (cam lo)) gia thanh vai cua tre*.