Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
thanh di » thanh de, thanh do, thanh dinh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cau duc » cao duc, cau luc, chu duc
duc gia » quoc gia
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va cau » van cau, va cac, va dau

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 ((nang xa) OR (lang xa)) hoi. hieu va cau duc gia ((thanh di) or (thanh doi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (lang xa)) hoi. hieu va cau duc gia ((thanh di) OR (thanh doi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) OR (lang xa)) hoi. hieu va cau duc gia ((thanh di) or (thanh doi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) OR (lang xa)) hoi. hieu va cau duc gia ((thanh di) or (thanh doi)) cua tre*.