Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
van phan » van phong, van thanh, luan phan
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
duy gia » duy gian, quy gia, duy nghia
duc gia » quoc gia
lai cua » dai cua, hai cua, lai chau
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: te sach y nang ma hoi. hieu van phan ((duy gia) or (duc gia)) thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu van phan ((duy gia) OR (duc gia)) thanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu van phan ((duy gia) or (duc gia)) thanh lai cua tre*.