Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham thuc » nham thuc, pham thuc, tham thuc
nuoc sach » nguoi sach, hoc sach, cuoc cach
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
thuc va » thuc vat, thuc dan, thuc day
danh di » danh du, danh dien, danh gia
xanh di » vanh dai, xanh tai
te sach » toc sach
ha hoi » hoa hoi, ha noi, xa hoi

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