Perhaps you should try some spelling variations:
nuoc quan » nuoc luan, quoc quan, nguoi quan
nuoc san » nuoc luan, nguoi san, nuoc sach
thuc van » thuc vat, thuc dan, thuc va
hieu van » hieu va, thien van, lieu va
phuc van » phuc va, chuc van, khuc van
hang di » hang doi, hang vi, hang dien
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nuoc san) or (nuoc quan)) ky nang xa hoi. hieu van cau ((phuc van) OR (thuc van)) hang di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc san) OR (nuoc quan)) ky nang xa hoi. hieu van cau ((phuc van) OR (thuc van)) hang di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc san) or (nuoc quan)) ky nang xa hoi. hieu van cau ((phuc van) OR (thuc van)) hang di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((nuoc san) or (nuoc quan)) ky nang xa hoi. hieu van cau ((phuc van) OR (thuc van)) hang di cua tre*.