Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh doi » thanh doi, hanh noi, hang doi
pham duy » pham duc
cham duc » pham duc, cham soc, phan duc
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ty nang » ty xang, ty hang, ly nang
doi cua » dai cua, hoi cua, dong cua
tu sach » thu sach, su sach, te sach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty nang) OR (ky nang)) xa hoi. hieu ve ((cham duc) or (pham duy)) va hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ky nang)) xa hoi. hieu ve ((cham duc) OR (pham duy)) va hanh doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ky nang)) xa hoi. hieu ve ((cham duc) or (pham duy)) va hanh doi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ky nang)) xa hoi. hieu ve ((cham duc) or (pham duy)) va hanh doi cua triet*.