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

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 dau 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 dau 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 dau cua triet*.