Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
vu nang » vuc nang, va nang, vu dang
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duc van » duc va, duc tan, duc manh
van anh » van thanh, tuan anh, van minh
anh vi » hanh vi, anh va, anh ve
x hoi » xa hoi, o hoi, x ho
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: tu sach ((vu nang) or (cam nang)) x hoi. hieu ve pham duc van anh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((vu nang) OR (cam nang)) x hoi. hieu ve pham duc van anh vi su triet*.