Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
hanh vai » hanh vi, hanh tai, hanh van
su sach » so sach, vu sach
hanh va » hang va, hanh vi
sach ky » sac ky, sach y, sach ty
cac bao » cach bao, cac bai, cac ban
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
bao va » bao ve, tao va, ban va
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 ky ((nang xa) or (lang xa)) hoi. hieu hien cac bao va ((hanh vai) OR (hanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (lang xa)) hoi. hieu hien cac bao va ((hanh vai) OR (hanh va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (lang xa)) hoi. hieu hien cac bao va ((hanh vai) OR (hanh va)) cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (lang xa)) hoi. hieu hien cac bao va ((hanh vai) OR (hanh va)) cua te*.