Perhaps you should try some spelling variations:
thong minh » thong tin, hoang minh
toa thong » toan thong, hoa thong, tra thong
nguoi duc » nguoi dua, nguoi ruc, nguoi nuoc
giai toa » giai thoai, giai doan, gioi toan
sach pha » sach phat, sach phap, sach nha
hoa minh » khoa minh, hoa sinh, hoa binh
so sach » so sanh, bo sach, co sach
ve giai » va giai, ve giao, de giai
vu sach » vu bach, su sach, vu khach
cham va » chat va, pham va, chai va
pha ve » phan ve
cha va » chat va, chai va, chua va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( vu sach ((cha va) or (cham va)) nguoi duc hoa minh ) or ( so sach pha ve giai toa thong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu sach ((cha va) OR (cham va)) nguoi duc hoa minh ) OR ( so sach pha ve giai toa thong minh )).
• Adding a wildcard symbol may retrieve word variants: (( vu sach ((cha va) or (cham va)) nguoi duc hoa minh ) or ( so sach pha ve giai toa thong minh ))*.