Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thuc » ban thuoc, dan thuc, van thuc
thu sach » tu sach, thuat sach, thuoc sach
toc sach » hoc sach, doc sach, thuoc sach
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren
hieu ve » hieu va, hieu van
ve ban » te ban, va ban, ve bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (toc sach)) ky lang ha noi. hieu ve ban thuc va hanh vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (toc sach)) ky lang ha noi. hieu ve ban thuc va hanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (toc sach)) ky lang ha noi. hieu ve ban thuc va hanh vi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (toc sach)) ky lang ha noi. hieu ve ban thuc va hanh vi ((cua tre) OR (cua triet))*.