Perhaps you should try some spelling variations:
hanh lam » thanh lap, hanh va, dinh lam
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vuc van » luc van, thuc van, chuc van
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang

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