Perhaps you should try some spelling variations:
nhung chong » nhung cong, nhung phong, nhung phuong
hung cuong » hung vuong, hong cuong, hung luong
hanh tang » hanh trang, anh tang, hanh mang
ho trieu » mot trieu, 25 trieu, ho chieu
30 trieu » 25 trieu
tang cua » mang cua, hang cua, tang luan
bai toan » bai tap
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho trieu) or (30 trieu)) tinh - hanh tang cua ((hung cuong) or (nhung chong)) bai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho trieu) OR (30 trieu)) tinh - hanh tang cua ((hung cuong) OR (nhung chong)) bai toan cao.
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) or (30 trieu)) tinh - hanh tang cua ((hung cuong) or (nhung chong)) bai toan cao*.