Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tinh vai » tinh va, tinh hai, tinh bai
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
cham lo » cham o, cham soc, cham hoi
va tinh » may tinh
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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: thu sach y tang ma hoi. hieu ve ((cham lo) or (cam lo)) va tinh vai ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y tang ma hoi. hieu ve ((cham lo) OR (cam lo)) va tinh vai ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach y tang ma hoi. hieu ve ((cham lo) or (cam lo)) va tinh vai ((cua tre) or (cau tren))*.