Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
khanh duc » khanh duy, khanh quoc, anh duc
va thanh » gia thanh, ban thanh, va tinh
vu khanh » vu thanh, van khanh, duy khanh
tu cach » tu cac
lam cua » nam cua, lam chat
hieu vu » hieu va, hieu ve, hieu su
cua tre » cua te, cuu tre, cua triet
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
ty tang » tay tang, ty xang, ty hang
su sach » so sach, vu sach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ty tang ((mai hoi) or (lai hoi)). hieu vu khanh duc va thanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ty tang ((mai hoi) OR (lai hoi)). hieu vu khanh duc va thanh lam cua tre*.