Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tru nang » tra nang, tri nang, truc nano
cham duc » cham soc, pham duy, phan duc
thu sach » tu sach, thuat sach, thuoc sach
tu nang » tu nong, tu nano, tu lang
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
hieu ve » hieu va, hieu van
ve cua » le cua, de cua, te cua

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