Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, nam thu, nam tu
danh cao » doanh cao, danh cho, danh ca
te sach » toc sach
sach ly » sach y, sach lo, sach ty
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
va danh » va dinh, va dan, va hanh

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 ly ((nang xa) or (nang ma)) hoi. hieu van ((nam thuc) OR (am thuc)) va danh cao chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly ((nang xa) OR (nang ma)) hoi. hieu van ((nam thuc) OR (am thuc)) va danh cao chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly ((nang xa) or (nang ma)) hoi. hieu van ((nam thuc) OR (am thuc)) va danh cao chat triet".
• Adding a wildcard symbol may retrieve word variants: te sach ly ((nang xa) or (nang ma)) hoi. hieu van ((nam thuc) OR (am thuc)) va danh cao chat triet*.