Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
nang xa » nang x, lang xa, nang ma
nam tuc » nam thuc, nam truc, nam tu
xa hanh » xa thanh, xa khanh, va hanh
hanh di » hanh vi, hanh de, hang di
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang xa hoi. hieu van nam tuc xa hanh di ((cua tu) OR (cua su))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu van nam tuc xa hanh di ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu van nam tuc xa hanh di ((cua tu) OR (cua su))*.