Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
pham thuc » phap thuc, pham chuc, nham thuc
nham thu » nham thuc, nam thu, pham thu
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
ki nang » ky nang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach ki » sach kinh, sach bai, sach kem
va hanh » van hanh, va thanh, va danh
thiet » thieu

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 ki nang xa hoi. hieu ve ((pham thuc) or (nham thu)) va hanh vai ((cua triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ki nang xa hoi. hieu ve ((pham thuc) OR (nham thu)) va hanh vai ((cua triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ki nang xa hoi. hieu ve ((pham thuc) or (nham thu)) va hanh vai ((cua triet) or (va thiet))*.