Perhaps you should try some spelling variations:
thien van » thi van
hieu van » lieu va, hieu ve
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
x hoi » xa hoi, o hoi, x ho

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: su sach ty nang x hoi. ((((hieu van) OR (thien van))) OR (hieu va)) cam duc va thanh va su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x hoi. ((((hieu van) OR (thien van))) or (hieu va)) cam duc va thanh va su triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. ((((hieu van) OR (thien van))) or (hieu va)) cam duc va thanh va su triet*.