Perhaps you should try some spelling variations:
van trieu » tan trieu, van tieu, van hieu
tan hanh » tan thanh, tang hanh, toan hanh
te sach » toc sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
van dau » van dao, phan dau
van hau » van ha, van hai, van hac
sach v » sach va, sach y, sach 2

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach v ((nang xa) OR (nang ma)) hoi. hieu ((van dau) or (van hau)) duc tan hanh vi van trieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v ((nang xa) OR (nang ma)) hoi. hieu ((van dau) OR (van hau)) duc tan hanh vi van trieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v ((nang xa) OR (nang ma)) hoi. hieu ((van dau) or (van hau)) duc tan hanh vi van trieu".
• Adding a wildcard symbol may retrieve word variants: te sach v ((nang xa) OR (nang ma)) hoi. hieu ((van dau) or (van hau)) duc tan hanh vi van trieu*.