Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hien cac » thien cac, vien cac, hieu cac
hang vai » hang tai, hang hai, hang vi
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
x hoi » xa hoi, o hoi, x ho

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 vu nang x hoi. dieu hien cac duc ban ((hang vai) or (hang va)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach vu nang x hoi. dieu hien cac duc ban ((hang vai) OR (hang va)) va triet.
• Adding a wildcard symbol may retrieve word variants: su sach vu nang x hoi. dieu hien cac duc ban ((hang vai) or (hang va)) va triet*.