Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
van hanh » van thanh, ban hanh, van ban
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
ky dang » ky nang, ky danh
qua cau » quan cau, qua cac, qua ca
cau luc » cau truc, cau phuc
van anh » van thanh, tuan anh, van minh
vi va » vi van, vai va, vu va

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tay lang) OR (ky dang)) xa hoi. hieu qua cau luc ((van hanh) OR (van anh)) vi va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tay lang) or (ky dang)) xa hoi. hieu qua cau luc ((van hanh) OR (van anh)) vi va triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((tay lang) or (ky dang)) xa hoi. hieu qua cau luc ((van hanh) OR (van anh)) vi va triet*.