Perhaps you should try some spelling variations:
hanh lam » thanh lap, hanh kem, hanh va
hanh lai » hanh tai, thanh lap, thanh loi
su sach » so sach, vu sach
van hoc » van hoa
sach ty » sach y, sach tu, sach thu
van hac » van ha, van hai, van chat
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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: su sach ty nang xa hoi. hieu ((van hac) OR (van hoc)) xuc va ((hanh lai) or (hanh lam)) hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((van hac) OR (van hoc)) xuc va ((hanh lai) OR (hanh lam)) hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ((van hac) OR (van hoc)) xuc va ((hanh lai) or (hanh lam)) hoa viet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((van hac) OR (van hoc)) xuc va ((hanh lai) or (hanh lam)) hoa viet*.