Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
van hoi » van hoa, van hoe, van loi
van hoc » van hoa
hieu va » lieu va, hieu qua
nam luc » nang luc, nhan luc, nam thuc
hanh ve » hanh vi, hanh va
y nang » ky nang, ly nang, v nang
va nam » van nam, ha nam, va nay
luc va » duc va, tuc va, loc va
kem » kiem

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 y nang ((van hoi) OR (van hoc)). hieu va nam luc va ((hanh ve) or (hanh kem)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((van hoi) OR (van hoc)). hieu va nam luc va ((hanh ve) OR (hanh kem)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((van hoi) OR (van hoc)). hieu va nam luc va ((hanh ve) or (hanh kem)) su triet*".