Perhaps you should try some spelling variations:
thanh lap » phan lap, thanh hai, thanh van
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ho » nang hoc, nang co, tang ho
van cac » van cau, van bac, dan cac
van hac » van hoc, van ha, van hai
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 ky nang ho hai. hieu ((van cac) or (van hac)) duc va ((thanh lap) OR (thanh san)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ho hai. hieu ((van cac) OR (van hac)) duc va ((thanh lap) OR (thanh san)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ho hai. hieu ((van cac) or (van hac)) duc va ((thanh lap) OR (thanh san)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ho hai. hieu ((van cac) or (van hac)) duc va ((thanh lap) OR (thanh san)) cua triet*.