Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
cau theo » cau thi, cau tao
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
cac tuc » cac toc, cac tu, cac tac
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
van cac » van hac, van cau, van bac
tuc va » thuc va, truc va, tuc xa
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 ((ty nang) or (ty hang)) x hoi. hieu van cac tuc va thanh lai ((cua tre) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) x hoi. hieu van cac tuc va thanh lai ((cua tre) OR (cau theo)).
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty hang)) x hoi. hieu van cac tuc va thanh lai ((cua tre) or (cau theo))*.