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 » van chi, va che, va cai
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 chi))) 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 chi))) OR (va cau)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ve cac luc bat tinh ((((va chu) OR (va chi))) 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 chi))) or (va cau)) tre*.