Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
hieu van » hieu va, thien van, lieu va
cu tren » tu tren, dua tren
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
sach ky » sach y, sach ty, sach kem
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
cau tuc » cau truc, cau tu, cau luc
tuc va » thuc va, truc va, tuc xa
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sac ky)) nang xa hoi. hieu van cau tuc va danh di ((cu tren) or (dung tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu van cau tuc va danh di ((cu tren) OR (dung tren)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang xa hoi. hieu van cau tuc va danh di ((cu tren) or (dung tren))*.