Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, dam thanh
nam thuc » nam thuoc, am thuc, nam thu
da thanh » dao thanh, dat thanh, dam thanh
sach thu » sach thue, sach thieu, sach tham
vu sach » vu bach, su sach, vu khach
doi cua » dai cua, hoi cua
cua tuc » cua duc, cua tu, cua thuoc
hieu va » lieu va, hieu qua
lang ha » long ha
lang xa » dang xay, lang van
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach thu ((lang xa) OR (lang ha)) hoi. hieu va nam thuc ((day thanh) or (da thanh)) doi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thu ((lang xa) OR (lang ha)) hoi. hieu va nam thuc ((day thanh) OR (da thanh)) doi cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach thu ((lang xa) OR (lang ha)) hoi. hieu va nam thuc ((day thanh) or (da thanh)) doi cua tuc".
• Adding a wildcard symbol may retrieve word variants: vu sach thu ((lang xa) OR (lang ha)) hoi. hieu va nam thuc ((day thanh) or (da thanh)) doi cua tuc*.