Perhaps you should try some spelling variations:
thien van » thi van
ve triet » va trien, su triet
vanh dai » van dai, vanh tai, lanh dao
van chat » cao chat
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, duc va
dai ve » dap ve, dau ve, dai va
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: ((tu sach) OR (thu sach)) v nang x hoi. thien van chat ((tuc va) OR (tuc xa)) vanh dai ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) v nang x hoi. thien van chat ((tuc va) or (tuc xa)) vanh dai ve triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) v nang x hoi. thien van chat ((tuc va) or (tuc xa)) vanh dai ve triet*.