Perhaps you should try some spelling variations:
bat tinh » ban tinh, sat tinh, bac tinh
luc bat » suc bat, luc nhat, luat bat
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
va chu » va che, va chi
va cai » va cac, va bai, va dai
va cau » van cau, va cac, va dau

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 ky nang xa hoi. hieu ve cac luc bat tinh ((((va chu) or (va cai))) or (va cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ve cac luc bat tinh ((((va chu) OR (va cai))) OR (va cau)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ve cac luc bat tinh ((((va chu) or (va cai))) or (va cau)) tre*.