Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
thu sach » tu sach, thuat sach, thu hoach
cao duc » dao duc, cao suc, giao duc
hieu va » hieu qua
duc van » duc va, duc tan, duc manh
hanh ca » hanh cac, hanh cat, hanh cua
y nang » ky nang, ly nang, v nang
ca cua » co cua
x hoi » xa hoi, o hoi, x ho

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 (thuoc sach)) y nang x hoi. ((hieu va) or (lieu va)) cao duc van hanh ca cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) y nang x hoi. ((hieu va) OR (lieu va)) cao duc van hanh ca cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) y nang x hoi. ((hieu va) or (lieu va)) cao duc van hanh ca cua triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) y nang x hoi. ((hieu va) or (lieu va)) cao duc van hanh ca cua triet*.