Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vanh dai » van dai, vanh tai, lanh dao
te sach » toc sach
ty nang » ty xang, ty hang, ly nang
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
va vanh » va van, va danh, va hanh
ma hoi » mai hoi, xa hoi, me hoi

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 ((ty nang) OR (ky nang)) ((ma hoi) or (ma hoa)). hieu qua cac duc va vanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ky nang)) ((ma hoi) OR (ma hoa)). hieu qua cac duc va vanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ky nang)) ((ma hoi) or (ma hoa)). hieu qua cac duc va vanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) OR (ky nang)) ((ma hoi) or (ma hoa)). hieu qua cac duc va vanh dai cua triet*.