Perhaps you should try some spelling variations:
bieu hien » dieu khien, bien phien, bien nien
dieu hien » dieu khien, dieu kien, dien bien
cac loai » cac bai, cac giai, cac dai
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac lop » cac hop
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
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 hoi. ((bieu hien) or (dieu hien)) ((cac lop) OR (cac loai)) va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((bieu hien) OR (dieu hien)) ((cac lop) OR (cac loai)) va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((bieu hien) or (dieu hien)) ((cac lop) OR (cac loai)) va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((bieu hien) or (dieu hien)) ((cac lop) OR (cac loai)) va hanh vai cua te*.