Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
va triet » va thiet, va trien, cua triet
bat hanh » bat khanh, ban hanh, bao hanh
ve triet » va trien, su triet
hieu va » hieu qua
sach ty » sach y, sach tu, sach thu
luc bat » suc bat, luc nhat, luat bat
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) OR (lieu va)) nhan luc bat hanh vi ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. ((hieu va) OR (lieu va)) nhan luc bat hanh vi ((va triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang xa hoi. ((hieu va) OR (lieu va)) nhan luc bat hanh vi ((va triet) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. ((hieu va) OR (lieu va)) nhan luc bat hanh vi ((va triet) or (ve triet))*.