Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
van cham » van chat, van tham, va cham
dinh dat » dinh ket, dinh van, dinh lam
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
truc va » thuc va, trung va
dat cua » dai cua, day cua, mat cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang xa hoi. thien van cham ((truc va) or (thuc vat)) dinh dat cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. thien van cham ((truc va) OR (thuc vat)) dinh dat cua triet.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. thien van cham ((truc va) or (thuc vat)) dinh dat cua triet*.