Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hieu hien » bieu hien, chieu chien, dieu khien
hanh vai » hanh va, hanh tai, hanh van
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
cac lo » cac lop, cac co, cac bo
cua tu » cua tuc, cua su, cua cu
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 hien) or (dieu hien)) cac lo va ((hanh vai) OR (hanh vi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu hien) OR (dieu hien)) cac lo va ((hanh vai) OR (hanh vi)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((hieu hien) or (dieu hien)) cac lo va ((hanh vai) OR (hanh vi)) cua tu".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu hien) or (dieu hien)) cac lo va ((hanh vai) OR (hanh vi)) cua tu*.