Perhaps you should try some spelling variations:
thuoc va » thuc va, thuoc ma, thuong va
thanh vi » hanh vi, thanh va, thanh ve
sach tu » sach thu, cach tu, sach uu
hieu ve » hieu va, hieu van
sach ty » sach y, sach thu, xach tay
vi cua » vai cua, di cua
ve nam » he nam, va nam, le nam
cua te » cua tu
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: vu ((sach ty) or (sach tu)) nang x hoi. hieu ve nam ((thuoc va) or (hoc ma)) thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ty) OR (sach tu)) nang x hoi. hieu ve nam ((thuoc va) OR (hoc ma)) thanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ty) or (sach tu)) nang x hoi. hieu ve nam ((thuoc va) or (hoc ma)) thanh vi cua te*.