Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
tu cao » cu cao, tu cac, vu cao
va cao » va cac, va co, va dao
tuc va » thuc va, tuc xa, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cao ky nang xa hoi. hieu va cao ((tuc va) OR (truc va)) dinh van cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cao ky nang xa hoi. hieu va cao ((tuc va) OR (truc va)) dinh van cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cao ky nang xa hoi. hieu va cao ((tuc va) OR (truc va)) dinh van cua tre*.