Perhaps you should try some spelling variations:
va triet » va thiet, ve triet, cua triet
ban hanh » ban hang
nhan luc » nang luc
va trien » va truyen, va thiet, va tuyen
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
sach ky » sac ky, sach ty, sach kem
luc ban » duc ban, cuc ban, luc bat
va nhan » van nhan, ca nhan, va phan

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

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