Perhaps you should try some spelling variations:
van nhan » van phan, van thanh, danh nhan
ban hanh » ban hang
va triet » va thiet, va trien, ve triet
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va nhan » ca nhan, va phan, va nha
luc ban » duc ban, cuc ban, luc bat

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 ty nang xa hoi. lieu ((va nhan) OR (van nhan)) luc ban hanh vi ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. lieu ((va nhan) OR (van nhan)) luc ban hanh vi ((va triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. lieu ((va nhan) OR (van nhan)) luc ban hanh vi ((va triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. lieu ((va nhan) OR (van nhan)) luc ban hanh vi ((va triet) or (su triet))*.