Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thai cua » than cua, tai cuc, tri cua
lang xa » lang ha, dang xay, lang van
cao tuc » dao tuc, cao duc, cao suc
va danh » va dinh, va dan, va hanh
tai cua » tai cuc, tri cua, dai cua
y lang » o lang, _ lang, tay lang
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa

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) OR (toc sach)) y lang xa hoi. lieu va cao tuc va danh ((tai cua) or (thai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y lang xa hoi. lieu va cao tuc va danh ((tai cua) OR (thai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) y lang xa hoi. lieu va cao tuc va danh ((tai cua) or (thai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) y lang xa hoi. lieu va cao tuc va danh ((tai cua) or (thai cua)) tre*.