Perhaps you should try some spelling variations:
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va dinh » van dinh, va kinh, va tinh
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
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 ve cam duc 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 ve cam duc va dinh ((vai cua) OR (di cua)) viet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ve cam duc va dinh ((vai cua) or (di cua)) viet*.