Perhaps you should try some spelling variations:
hanh lam » thanh lap, hanh kem, hanh va
tay tang » tay lang, tay trung, tay quang
cham duc » pham duc, cham soc, pham duy
so sach » so sanh, bo sach, co sach
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
ty hang » ly hang, ty xang, thi hang
cua tre » cua te, cuu tre, cua triet
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: so sach ((ty hang) or (tay tang)) ma hoi. hieu vu cham duc va ((hanh lam) or (thanh san)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty hang) OR (tay tang)) ma hoi. hieu vu cham duc va ((hanh lam) OR (thanh san)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ((ty hang) or (tay tang)) ma hoi. hieu vu cham duc va ((hanh lam) or (thanh san)) cua tre*.