Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
toc sach » hoc sach, doc sach, thuoc sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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: toc sach y nang ma hoi. hieu ve ((pham duy) or (pham duc)) gia thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. hieu ve ((pham duy) OR (pham duc)) gia thanh lap cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoi. hieu ve ((pham duy) or (pham duc)) gia thanh lap cua tre*.