Perhaps you should try some spelling variations:
thong minh » thong tin, hoang minh
nguoi dua » nguoi qua, nguoi cua, nguoi da
bai thong » bai trong, ban thong, tai thuong
giai bai » gia ba
sach cha » sach nha, sach che, sach ha
hoa minh » khoa minh, hoa sinh, hoa binh
dua hoa » duc hoa, da hoa, du hoa
so sach » so sanh, bo sach, co sach
ve giai » va giai, ve giao, de giai
chai va » chat va, thai va, cai va
su sach » vu sach
hai va » hai van, thai va, hoi va
cha ve » cha me, ca ve, pha ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach ((chai va) OR (hai va)) nguoi dua hoa minh ) or ( so sach cha ve giai bai thong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach ((chai va) OR (hai va)) nguoi dua hoa minh ) OR ( so sach cha ve giai bai thong minh )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su sach ((chai va) OR (hai va)) nguoi dua hoa minh ) or ( so sach cha ve giai bai thong minh ))".
• Adding a wildcard symbol may retrieve word variants: (( su sach ((chai va) OR (hai va)) nguoi dua hoa minh ) or ( so sach cha ve giai bai thong minh ))*.