Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
cham lo » cham o, cham hoi, cham lai
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ty tang » tay tang, ty xang, ty hang
cam lo » nam lo, cam ly, cam o
ma hoi » mai hoi, xa hoi, ma hoa

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 ty tang ma hoi. hieu ve ((((cham lo) OR (cham soc))) or (cam lo)) van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty tang ma hoi. hieu ve ((((cham lo) OR (cham soc))) OR (cam lo)) van hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty tang ma hoi. hieu ve ((((cham lo) OR (cham soc))) or (cam lo)) van hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ty tang ma hoi. hieu ve ((((cham lo) OR (cham soc))) or (cam lo)) van hanh vai cua tre*.