Perhaps you should try some spelling variations:
thong minh » thong tin, hoang minh
giai toan » giai doan, giai toa, gioi toan
me nguoi » ma nguoi, le nguoi, ke nguoi
co thong » co trong, co phong, co tong
bo thong » pho thong, bo truong, he thong
toc sach » hoc sach, doc sach, thuoc sach
su sach » so sach, vu sach
sach ha » sach nha, sach han, sach xa
sach ba » sach bai, sach bac, sach bao
me giai » de giai, ve giai, ke giai
ha me » cha me, ha le, ca me

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 ha me nguoi ((co thong) OR (bo thong)) tin ) or ( toc sach ba me giai toan thong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach ha me nguoi ((co thong) OR (bo thong)) tin ) OR ( toc sach ba me giai toan thong minh )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su sach ha me nguoi ((co thong) OR (bo thong)) tin ) or ( toc sach ba me giai toan thong minh ))".
• Adding a wildcard symbol may retrieve word variants: (( su sach ha me nguoi ((co thong) OR (bo thong)) tin ) or ( toc sach ba me giai toan thong minh ))*.