Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
lang van » dang van, tang van, hoang van
xanh di » danh di, vanh dai, xanh tai
va xanh » va danh, va hanh, va anh
thuc va » thuc vat, thuc dan, thuc day
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
cua tu » cua tuc, cua su, cua cu

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) OR (doc sach)) _ lang van hoi. hieu ve cham thuc va xanh di ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) _ lang van hoi. hieu ve cham thuc va xanh di ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) _ lang van hoi. hieu ve cham thuc va xanh di ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) _ lang van hoi. hieu ve cham thuc va xanh di ((cua te) or (cua tu))*.