Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
chua tre » chua tri, cua tre, chua trieu
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
dinh va » dinh van, dinh ve, tinh va
va chua » vua chua, ca chua, va chu
lao va » cao va, bao va, dao va

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. hieu hien cac ((lao va) or (tao va)) dinh va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu hien cac ((lao va) OR (tao va)) dinh va chua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu hien cac ((lao va) or (tao va)) dinh va chua tre*.