Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
toc sach » hoc sach, doc sach, thuoc sach
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
ve cac » va cac, vien cac
dau va » dau ve, lau va
van su » dan su
du va » tu va, su va, vu va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y nang) OR (v nang)) ma hoi. hieu ve cac ((du va) OR (dau va)) thanh van su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y nang) OR (v nang)) ma hoi. hieu ve cac ((du va) or (dau va)) thanh van su triet~".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y nang) OR (v nang)) ma hoi. hieu ve cac ((du va) or (dau va)) thanh van su triet*.