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

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ky lang) or (ky dang)) xa hoi. hieu qua cau luc ((va hanh) OR (va danh)) vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky dang)) xa hoi. hieu qua cau luc ((va hanh) OR (va danh)) vi va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) or (ky dang)) xa hoi. hieu qua cau luc ((va hanh) OR (va danh)) vi va triet*".