Perhaps you should try some spelling variations:
cach thuc » anh thuc
dia thanh » gia thanh, da thanh, dinh thanh
su triet » su viet, su tien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
cua tre » cua te, cuu tre, cua triet
bo sach » co sach, hoc sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
cac thu » cac thoi
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: bo sach y lang xa hoi. hieu va ((cach thuc) or (cac thu)) dia thanh vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach y lang xa hoi. hieu va ((cach thuc) OR (cac thu)) dia thanh vi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: bo sach y lang xa hoi. hieu va ((cach thuc) or (cac thu)) dia thanh vi ((cua tre) or (su triet))*.