Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
cua triet » cua viet, su triet, va triet
thuc gia » thuc giai, thue gia, thuc dia
thanh vi » hanh vi, thanh va, thanh ve
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cach » va cac
cua tre » cua te, cuu tre, dua tren
y lang » o lang, _ lang, tay lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (bo sach)) y lang xa hoi. hieu va cach thuc gia thanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) y lang xa hoi. hieu va cach thuc gia thanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) y lang xa hoi. hieu va cach thuc gia thanh vi ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (bo sach)) y lang xa hoi. hieu va cach thuc gia thanh vi ((cua tre) or (cua triet))*.