Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
hanh lam » thanh lap, hanh va, dinh lam
va triet » va thiet, va trien, ve triet
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang x hoi. ((hieu van) or (hieu va)) cam xuc van ((hanh lam) or (hanh kem)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang x hoi. ((hieu van) OR (hieu va)) cam xuc van ((hanh lam) OR (hanh kem)) va triet.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang x hoi. ((hieu van) or (hieu va)) cam xuc van ((hanh lam) or (hanh kem)) va triet*.