Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
dinh su » dinh so, hinh su, dinh cu
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, 5 hoi
su va » su van, tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ((x hoi) OR (x ho)). hieu ve cam ((xuc va) or (truc va)) dinh su va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((x hoi) OR (x ho)). hieu ve cam ((xuc va) OR (truc va)) dinh su va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((x hoi) OR (x ho)). hieu ve cam ((xuc va) or (truc va)) dinh su va triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((x hoi) OR (x ho)). hieu ve cam ((xuc va) or (truc va)) dinh su va triet*.