Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
vu sach » vu bach, su sach, vu khach
ky danh » ky anh, ky dang
danh xa » danh ca, dinh xa, canh xa
hieu ve » hieu va, hieu van
ba mach » ban mach, tao mach
ve cac » va cac, vien cac
dan ba » dan bac, dan ca, dan va
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (vu sach)) ky danh xa hoi. hieu ve cac dan ba mach vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu sach)) ky danh xa hoi. hieu ve cac dan ba mach vi su triet*.