Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
te sach » toc sach
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
hanh di » hanh vi, hang di, danh di
hanh de » hanh ve, hanh kem
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
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: te sach y nang x hoi. hieu ve cac duc van ((hanh di) or (hanh de)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu ve cac duc van ((hanh di) OR (hanh de)) cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu ve cac duc van ((hanh di) or (hanh de)) cua triet*.