Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
va triet » va thiet, va trien, cua triet
bat hanh » bat khanh, ban hanh, bao hanh
nhan luc » nang luc
ve triet » va trien, su triet
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach tu, sach thu
va nhan » van nhan, ca nhan, va phan
luc bat » suc bat, luc nhat, luat bat
nang xa » nang x, lang xa, mang xa
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ty ((nang xa) OR (nang ma)) hoi. hieu va nhan luc bat hanh vi ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty ((nang xa) OR (nang ma)) hoi. hieu va nhan luc bat hanh vi ((va triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty ((nang xa) OR (nang ma)) hoi. hieu va nhan luc bat hanh vi ((va triet) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty ((nang xa) OR (nang ma)) hoi. hieu va nhan luc bat hanh vi ((va triet) or (ve triet))*.