Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
cua triet » cua viet, su triet, va triet
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
hanh cua » manh cua, hang cua, hanh sua
ly nang » ky nang, ly hang, ly vang
hieu va » hieu qua
cao duc » dao duc, cao suc, giao duc
duc van » duc va, duc tan, duc manh
cua cua » cua chua, ca cua, qua 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: ((thuoc sach) or (hoc sach)) ly nang x hoi. ((hieu va) or (lieu va)) cao duc van hanh cua cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ly nang x hoi. ((hieu va) OR (lieu va)) cao duc van hanh cua cua triet.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (hoc sach)) ly nang x hoi. ((hieu va) or (lieu va)) cao duc van hanh cua cua triet*.