Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
su triet » su viet, su tien, ve triet
va trien » va truyen, va thiet, va tuyen
ban hanh » ban hang
tu tieng » luc tieng, tu tuong, tu trong
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
luc ban » duc ban, cuc ban, luc bat
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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 ty nang xa hoi. hieu va nhan luc ban hanh vi ((va trien) or (((su triet) or (tu tieng))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. hieu va nhan luc ban hanh vi ((va trien) OR (((su triet) OR (tu tieng)))).
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu va nhan luc ban hanh vi ((va trien) or (((su triet) or (tu tieng))))*.