Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
so sach » so sanh, bo sach, co sach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
qua cac » cua cac
hanh de » hanh ve, hanh kem
xuc va » tuc va, luc va, xac va
de cua » le cua, te cua, dieu cua

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