Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
diem cau » dieu can
nang xa » nang x, lang xa, nang ma
nam tuc » nam thuc, nam truc, nam tu
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
di cuu » di cau, di cua, dinh cuu
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky nang xa hoi. hieu van nam tuc ((va dinh) OR (va tinh)) ((di cuu) or (diem cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang xa hoi. hieu van nam tuc ((va dinh) OR (va tinh)) ((di cuu) OR (diem cau)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang xa hoi. hieu van nam tuc ((va dinh) OR (va tinh)) ((di cuu) or (diem cau)) tre*".