Perhaps you should try some spelling variations:
ve triet » su triet
va trien » va truyen, va thiet, va tuyen
hanh vu » hanh vi, hanh va, hanh tu
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
luc va » duc va, tuc va
y nang » ky nang, ly nang, v nang
loc va » hoc va
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. hieu ve cac ((luc va) OR (loc va)) hanh vu ((va trien) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu ve cac ((luc va) OR (loc va)) hanh vu ((va trien) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu ve cac ((luc va) OR (loc va)) hanh vu ((va trien) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu ve cac ((luc va) OR (loc va)) hanh vu ((va trien) or (ve triet))*.