Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
van doanh » toan doanh, van dong, van thanh
hien cac » thien cac, vien cac, hieu cac
doanh va » doan va, doanh tai, doanh cua
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
cac le » cach le, cac he, mac le
va cua » va chua, via cua, ca 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) OR (sach y))) or (cac ky)) nang xa hoi. hieu hien cac le van doanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sach y))) OR (cac ky)) nang xa hoi. hieu hien cac le van doanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sach ky) OR (sach y))) or (cac ky)) nang xa hoi. hieu hien cac le van doanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) OR (sach y))) or (cac ky)) nang xa hoi. hieu hien cac le van doanh va cua tre*.