Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tinh hai » tinh thai, tinh chat, trinh han
tang ma » mang may, tang van
cham lo » cham o, cham soc, cham hoi
va tinh » may tinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y tang » ky tang, 6 tang, 7 tang
ma hoi » mai hoi, xa hoi, ma hoa
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. lieu va ((cham lo) or (cam lo)) va tinh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y tang ma hoi. lieu va ((cham lo) OR (cam lo)) va tinh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y tang ma hoi. lieu va ((cham lo) or (cam lo)) va tinh hai cua tre*.