Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hac loai » cac loai, lac loai, phan loai
te sach » toc sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
loai va » loai nam
van hac » van hoc, van ha, van hai
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (hang va)) hoi. hieu van hac loai va danh vi ((cua te) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) or (hang va)) hoi. hieu van hac loai va danh vi ((cua te) OR (cua tu))~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (hang va)) hoi. hieu van hac loai va danh vi ((cua te) OR (cua tu))*.