Perhaps you should try some spelling variations:
khanh vinh » thanh vinh, khanh linh, thanh binh
thanh tinh » thanh binh, nhanh tinh, than kinh
hieu viec » nhieu viec, hieu ve, sieu viet
cua triet » cua viet, su triet, va triet
viec cac » vien cac, viec cua, viec va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
cac duc » cac du, cac dac, cao duc
duc van » duc va, duc tan, duc manh

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 tang xa hoi. hieu viec cac duc van ((khanh vinh) or (thanh tinh)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. hieu viec cac duc van ((khanh vinh) OR (thanh tinh)) cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. hieu viec cac duc van ((khanh vinh) or (thanh tinh)) cua triet*.