Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
dinh va » dinh van, dinh ve, tinh va
va dinh » van dinh, va kinh, va tinh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
va cua » va chua, via cua, ca cua
cua cu » cua chu, cua cau, cua su
sac ky » cac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sac ky) or (sai ky)) nang xa hoi. ((hieu va) or (hieu van)) cao duc va dinh va cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sac ky) OR (sai ky)) nang xa hoi. ((hieu va) OR (hieu van)) cao duc va dinh va cua cu.
• Adding a wildcard symbol may retrieve word variants: hoc ((sac ky) or (sai ky)) nang xa hoi. ((hieu va) or (hieu van)) cao duc va dinh va cua cu*.