Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
chat xuc » chat huu, cam xuc, chao xu
van hanh » van thanh, ban hanh, van anh
hanh lam » thanh lap, hanh kem, hanh va
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
lam va » nam va, dam va, lam ha
thiet » thieu

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) or (co sach)) ty nang xa hoi. ((hieu quan) or (hieu qua)) chat xuc van hanh lam va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ty nang xa hoi. ((hieu quan) OR (hieu qua)) chat xuc van hanh lam va thiet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ty nang xa hoi. ((hieu quan) or (hieu qua)) chat xuc van hanh lam va thiet*.