Perhaps you should try some spelling variations:
thanh do » thanh de, thanh pho, thanh hoa
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
cua tre » cua te, cuu tre, cua triet
xuc va » tuc va, luc va, xac va
do cua » doi cua, co cua, de cua

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 ky nang xa hoi. thi van nam ((xuc va) or (duc va)) thanh do cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. thi van nam ((xuc va) OR (duc va)) thanh do cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. thi van nam ((xuc va) or (duc va)) thanh do cua tre*.