Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
san thanh » ban thanh, van thanh, son thanh
hieu van » hieu va, thien van, lieu va
van thac » van hac, van tham, van than
thac cac » thoai cac, thanh cac, thuc cach
tu sach » thu sach, su sach, te sach
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
cac san » cac dan, cac van, cac ban
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 lo nang x hoi. hieu van thac cac san thanh dai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach lo nang x hoi. hieu van thac cac san thanh dai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach lo nang x hoi. hieu van thac cac san thanh dai ((cua tre) or (cua te))*.