Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
ve chat » va chat, van chat
tuc van » thuc van, truc van, tuc va
ve cham » va cham, vu cham, ve chim
van hoi » van hoa, van hoc, van hoe
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
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: toc sach ((y lang) OR (_ lang)) van hoi. hieu ((ve cham) or (ve chat)) tuc van hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y lang) OR (_ lang)) van hoi. hieu ((ve cham) OR (ve chat)) tuc van hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y lang) OR (_ lang)) van hoi. hieu ((ve cham) or (ve chat)) tuc van hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y lang) OR (_ lang)) van hoi. hieu ((ve cham) or (ve chat)) tuc van hanh vi cua te*.