Perhaps you should try some spelling variations:
tinh lai » tinh lao, tinh hai, minh lai
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
va tinh » may tinh
luc va » duc va, tuc va, loc va
lai ve » loai ve, lai va, la ve

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

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