Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cau thuc » cau truc, cuu thuc, can thuc
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
vat dan » va dan, van dan, vat ran
tu ban » thu ban, te ban
ban ky » van ky, dan ky
di cua » dai cua, doi cua, de cua
le cua » ly cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ban ky nang xa hoi. hieu van cau thuc vat dan ((di cua) or (le cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky nang xa hoi. hieu van cau thuc vat dan ((di cua) OR (le cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu ban ky nang xa hoi. hieu van cau thuc vat dan ((di cua) or (le cua)) tre*.