Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
hieu van » hieu va, thien van, lieu va
van chat » cao chat
dinh dao » minh dao, dinh cao, trinh dao
dinh dat » dinh ket, dinh van, dinh lam
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
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: thu ((sach y) or (sac ky)) nang xa hoi. hieu van chat thuc va ((dinh dao) OR (dinh dat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach y) OR (sac ky)) nang xa hoi. hieu van chat thuc va ((dinh dao) OR (dinh dat)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach y) or (sac ky)) nang xa hoi. hieu van chat thuc va ((dinh dao) OR (dinh dat)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach y) or (sac ky)) nang xa hoi. hieu van chat thuc va ((dinh dao) OR (dinh dat)) cua tre*.