Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
su sach » so sach, vu sach
va dinh » van dinh, va kinh, va tinh
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
cac lop » cac hop, cac loai
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac lo » cac co, cac bo, cac ho

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 ((cac lo) or (cac lop)) va dinh ((vai cua) OR (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu hien ((cac lo) OR (cac lop)) va dinh ((vai cua) OR (lai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu hien ((cac lo) or (cac lop)) va dinh ((vai cua) OR (lai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu hien ((cac lo) or (cac lop)) va dinh ((vai cua) OR (lai cua)) tre*.