Perhaps you should try some spelling variations:
hanh van » thanh van, khanh van, hanh va
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
han tai » hang tai, nhan tai, van tai
y nang » ky nang, ly nang, v nang
nam tu » nam thu, nam thuc

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) or (lieu va)) nam tu va ((hanh van) or (han tai)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. ((hieu ve) OR (lieu va)) nam tu va ((hanh van) OR (han tai)) cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. ((hieu ve) or (lieu va)) nam tu va ((hanh van) or (han tai)) cua viet*.