Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
va dinh » van dinh, va kinh, va tinh
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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 van cam xuc va dinh ((vai cua) or (di cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van cam xuc va dinh ((vai cua) OR (di cua)) viet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van cam xuc va dinh ((vai cua) or (di cua)) viet*.