Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
v nang » va nang, vu nang, van nang
ve cac » va cac, vien cac
cac tu » cac thu, cach tu, cac du
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (co sach)) v nang xa hoi. hieu ve cac tu va thanh vi ((cua triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) v nang xa hoi. hieu ve cac tu va thanh vi ((cua triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) v nang xa hoi. hieu ve cac tu va thanh vi ((cua triet) or (va thiet))*.