Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
tang mai » tang ma, tang tai, lang mai
tu sach » thu sach, su sach, te sach
cham lo » cham o, cham soc, cham hoi
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
y tang » ky tang, 6 tang, 7 tang
cam lo » nam lo, cam ly, cam o
nam so » nam sao, nam bo

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 ((cham lo) or (((cam lo) or (nam so)))) gia thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y tang mai hoi. hieu ve ((cham lo) OR (((cam lo) OR (nam so)))) gia thanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y tang mai hoi. hieu ve ((cham lo) or (((cam lo) or (nam so)))) gia thanh tai cua tre*.