Perhaps you should try some spelling variations:
thanh hang » thanh hoang, thanh thang, tranh hang
hanh trinh » canh tranh, hanh chinh
nang cong » nang song, dang cong, bang cong
ho trieu » mot trieu, 30 trieu, ho chieu
25 trieu » 30 trieu
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan ban » van ban
va nang » van nang, da nang, cam nang

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 (25 trieu)) tinh - ((thanh hang) or (hanh trinh)) va nang cong bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho trieu) OR (25 trieu)) tinh - ((thanh hang) OR (hanh trinh)) va nang cong bai toan ban.
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) or (25 trieu)) tinh - ((thanh hang) or (hanh trinh)) va nang cong bai toan ban*.