Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
khai cua » thai cua, hai cua, khan cua
hac thuc » hoc thuc, ha thuc, thach thuc
khi cua » chi cua, thai cua
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
nang xa » lang xa, nang ma, mang xa
van hac » van hoc, van ha, van hai
va dan » ca dan, va dao, va dau

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 tu ((nang xa) or (nang x)) hoi. hieu van hac thuc va dan ((khai cua) OR (khi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((nang xa) OR (nang x)) hoi. hieu van hac thuc va dan ((khai cua) OR (khi cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ((nang xa) or (nang x)) hoi. hieu van hac thuc va dan ((khai cua) OR (khi cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach tu ((nang xa) or (nang x)) hoi. hieu van hac thuc va dan ((khai cua) OR (khi cua)) triet*.