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