Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac thuc » cach thuc, cac thu, can thuc
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
tinh di » tinh doi, trinh di, tinh da
cuu tre » cua tre, cau tren, cau treo
sac ky » sai ky
di cuu » di cau, di cua, dinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sac ky) or (cac ky)) nang xa hoi. hieu van cac thuc va tinh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (cac ky)) nang xa hoi. hieu van cac thuc va tinh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) or (cac ky)) nang xa hoi. hieu van cac thuc va tinh di cuu tre*.