Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tham tuc » tham thuc, thai tuc, nham thuc
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
va tham » van tham, va cham, va thanh
xa dinh » xac dinh, va dinh, ba dinh
dat cua » day cua, mat cua, dan cua
ma hoi » mai hoi, xa hoi, me hoi

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 ty sang ((ma hoi) OR (ma hoa)). lieu va tham tuc xa dinh ((dat cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty sang ((ma hoi) OR (ma hoa)). lieu va tham tuc xa dinh ((dat cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty sang ((ma hoi) OR (ma hoa)). lieu va tham tuc xa dinh ((dat cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ty sang ((ma hoi) OR (ma hoa)). lieu va tham tuc xa dinh ((dat cua) or (dai cua)) tre*.