Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dau tren » dat tren, dau tieng, dau trong
dau tien » van tien
lang xa » lang ha, dang xay, lang van
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
va cao » va cac, va dao, va bao
sach v » sach va, sach y, sach 2
luc va » duc va, tuc va, loc va
v lang » va lang, o lang, _ lang
va co » vo co

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 v lang xa hoi. hieu ((va cao) or (va co)) luc va danh di ((dau tren) OR (dau tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v lang xa hoi. hieu ((va cao) OR (va co)) luc va danh di ((dau tren) OR (dau tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v lang xa hoi. hieu ((va cao) or (va co)) luc va danh di ((dau tren) OR (dau tien))".
• Adding a wildcard symbol may retrieve word variants: toc sach v lang xa hoi. hieu ((va cao) or (va co)) luc va danh di ((dau tren) OR (dau tien))*.