Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
cam truc » cau truc, nam truc, lam truoc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
truc va » thuc va, thuc vat, trung va
di cua » dai cua, doi cua, de cua
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 ((sac ky) or (sach y)) nang xa hoi. ((hieu ve) OR (hieu va)) cam truc va thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach y)) nang xa hoi. ((hieu ve) OR (hieu va)) cam truc va thanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sach y)) nang xa hoi. ((hieu ve) OR (hieu va)) cam truc va thanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach y)) nang xa hoi. ((hieu ve) OR (hieu va)) cam truc va thanh di cua tre*.