Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
hanh lam » thanh lap, hanh kem, hanh va
hanh lai » hanh tai, thanh lap, thanh loi
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
sach tu » sach thu, cach tu, sach ty
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu nano
cua tre » cua te, cuu tre, cua triet
x hoi » o hoi, x ho, 5 hoi

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 tu nang ((x hoi) OR (xa hoi)). hieu va cham duc va ((hanh lai) OR (hanh lam)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang ((x hoi) OR (xa hoi)). hieu va cham duc va ((hanh lai) OR (hanh lam)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang ((x hoi) OR (xa hoi)). hieu va cham duc va ((hanh lai) OR (hanh lam)) cua tre*.