Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
xa thanh » va thanh, ha thanh, ta thanh
su sach » so sach, vu sach
cua tre » cuu tre, cua triet, dua tren
cac toc » cac toi, cac nuoc, cac thoi
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
toc xa » tuc xa, toc ta, hoc xa
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang ((ma hoi) or (mai hoi)). hieu va cac toc xa thanh doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((ma hoi) OR (mai hoi)). hieu va cac toc xa thanh doi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((ma hoi) or (mai hoi)). hieu va cac toc xa thanh doi ((cua tre) or (cua te))*.