Perhaps you should try some spelling variations:
dinh thi » dinh tri
tu sach » thu sach, su sach, te sach
thi cua » thai cua, thi cuc, tri cua
va dinh » van dinh, va kinh, va tinh
cac loc » cac lop, cac toc, cac hoc
sach ty » sach y, sach tu, sach thu
hieu va » hieu qua
lang ha » long ha
lang xa » dang xay, lang van
cua tuc » cua duc, cua tu, cua thuoc
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((lang xa) OR (lang ha)) hoi. ((hieu va) or (lieu va)) cac loc va dinh thi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((lang xa) OR (lang ha)) hoi. ((hieu va) OR (lieu va)) cac loc va dinh thi cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((lang xa) OR (lang ha)) hoi. ((hieu va) or (lieu va)) cac loc va dinh thi cua tuc".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((lang xa) OR (lang ha)) hoi. ((hieu va) or (lieu va)) cac loc va dinh thi cua tuc*.