Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
danh dau » lanh dao, hang dau, xang dau
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
danh tu » anh tu, doanh thu
ve cac » vien cac
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y nang xa hoi. hieu ((ve cac) or (va cac)) xuc va ((danh dau) OR (danh tu)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang xa hoi. hieu ((ve cac) OR (va cac)) xuc va ((danh dau) OR (danh tu)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y nang xa hoi. hieu ((ve cac) or (va cac)) xuc va ((danh dau) OR (danh tu)) su triet".
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang xa hoi. hieu ((ve cac) or (va cac)) xuc va ((danh dau) OR (danh tu)) su triet*.