Perhaps you should try some spelling variations:
hieu thien » chieu chien, dieu khien, bieu hien
hieu hien » bieu hien, dieu hien, chieu chien
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac lo » cac lop, cac co, cac bo
cua te » cua tu
lo va » lo van, lao va, ly va

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 hoi. ((hieu thien) or (hieu hien)) cac lo va ((hanh vi) or (hanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu thien) OR (hieu hien)) cac lo va ((hanh vi) OR (hanh tai)) cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu thien) or (hieu hien)) cac lo va ((hanh vi) or (hanh tai)) cua te*.