Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
chua tre » chua tri, cua tre, chua trieu
hien cac » thien cac, vien cac, hieu cac
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach ty, sach kem
tinh va » tich va, trinh van, trinh vat
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) OR (sach y)) nang xa hoi. hieu hien cac ((lao va) or (tao va)) tinh va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang xa hoi. hieu hien cac ((lao va) OR (tao va)) tinh va chua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang xa hoi. hieu hien cac ((lao va) or (tao va)) tinh va chua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang xa hoi. hieu hien cac ((lao va) or (tao va)) tinh va chua tre*.