Perhaps you should try some spelling variations:
danh dien » dinh dien, danh kien, danh lien
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va dan, va hanh
truc va » thuc va, thuc vat, trung va
van cau » van dau, van hau, van chat
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
cu tre » cu tren, cua tre, cu tri

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 ky) OR (sach y)) nang xa hoi. hieu van cau truc va danh dien ((cu tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach y)) nang xa hoi. hieu van cau truc va danh dien ((cu tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach y)) nang xa hoi. hieu van cau truc va danh dien ((cu tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sach y)) nang xa hoi. hieu van cau truc va danh dien ((cu tre) or (cuu tre))*.