Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
va thanh » gia thanh, ban thanh, va tinh
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
nang ro » nang co, nang ho, nang ra
van bac » van ban, van bao, dan bac
van hac » van hoc, van ha, van hai
ro hai » co hai, o hai, so hai
hai va » hai van, thai va, hoi va

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) or (thu hoach)) ky nang ro hai. hieu ((van bac) or (van hac)) duc va thanh hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky nang ro hai. hieu ((van bac) OR (van hac)) duc va thanh hai va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky nang ro hai. hieu ((van bac) or (van hac)) duc va thanh hai va triet*.