Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
qua cac » cua cac
hanh de » hanh ve, hanh kem
xuc va » tuc va, luc va, xac va

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 ky lang xa hoi. hieu qua cac ((xuc va) or (duc va)) hanh de ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky lang xa hoi. hieu qua cac ((xuc va) OR (duc va)) hanh de ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky lang xa hoi. hieu qua cac ((xuc va) or (duc va)) hanh de ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: so sach ky lang xa hoi. hieu qua cac ((xuc va) or (duc va)) hanh de ((cua triet) OR (su triet))*.