Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh dai » danh dau, danh di, danh sai
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nang xa » lang xa, nang ma, mang xa
sach ty » sach y, sach tu, sach thu
van cau » van dau, van hau, van chat
truc va » thuc vat, trung va
thuc va » thuc vat, thuc dan, thuc day

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((nang xa) or (nang x)) hoi. hieu van cau ((truc va) or (thuc va)) danh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang xa) OR (nang x)) hoi. hieu van cau ((truc va) OR (thuc va)) danh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((nang xa) or (nang x)) hoi. hieu van cau ((truc va) or (thuc va)) danh dai cua triet*.