Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc day » thuc dan, thuc vat
nang lai » nang tai, mang lai, nang cai
sach ky » sach y, sach ty, sach kem
van cac » van hac, van cau, van bac
lai hoi » dai hoi, lai hoa, lai roi
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sac ky)) nang lai hoi. hieu van cac ((luc va) or (thuc day)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang lai hoi. hieu van cac ((luc va) OR (thuc day)) hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang lai hoi. hieu van cac ((luc va) or (thuc day)) hanh vi cua te*.