Perhaps you should try some spelling variations:
khac triet » khac biet
nha triet » cua triet, va triet
tinh lam » trinh lam, dinh lam, tinh lao
va tinh » may tinh
tu sach » thu sach, su sach, te sach
van cac » van cau, van bac, dan cac
nang ho » nang hoc, nang co, tang ho
van hac » van hoc, van ha, van hai
y nang » ky nang, ly nang, v nang
ho hai » hoc hai, pho hai, cho hai

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 y nang ho hai. hieu ((van cac) or (van hac)) duc va tinh lam ((nha triet) OR (khac triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ho hai. hieu ((van cac) OR (van hac)) duc va tinh lam ((nha triet) OR (khac triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ho hai. hieu ((van cac) or (van hac)) duc va tinh lam ((nha triet) OR (khac triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ho hai. hieu ((van cac) or (van hac)) duc va tinh lam ((nha triet) OR (khac triet))*.