Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cua tuc » cua duc, cua thuoc, luat tuc
vu san » vu ban
va san » va ban
va nam » van nam, ha nam, va nay
cua tu » cua su, cua cu, cua te

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu san) or (va san)) ky nang xa hoi. hieu va nam thuc va hanh vi ((cua tu) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu san) OR (va san)) ky nang xa hoi. hieu va nam thuc va hanh vi ((cua tu) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: ((vu san) or (va san)) ky nang xa hoi. hieu va nam thuc va hanh vi ((cua tu) or (cua tuc))*.