Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach v nang x hoi. hieu ((van cam) or (van cau)) thuc van hanh vi ((cua tu) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach v nang x hoi. hieu ((van cam) OR (van cau)) thuc van hanh vi ((cua tu) OR (cua cu)).
• Adding a wildcard symbol may retrieve word variants: thuoc sach v nang x hoi. hieu ((van cam) or (van cau)) thuc van hanh vi ((cua tu) or (cua cu))*.