Perhaps you should try some spelling variations:
sanh nganh » anh ngan, dang nganh, sach ngan
cong thai » cong hai, hong thai, cong thanh
cac nganh » hoc nganh
cong khi » khong khi, co khi, cong ha
so sanh » do sanh
vu cac » va cac, tu cac, ve cac
y khi » ly khi, ky khi, my khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh nganh ((cong khi) or (cong thai)) đong luc ) or ( vu cac nganh y khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh nganh ((cong khi) OR (cong thai)) đong luc ) OR ( vu cac nganh y khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh nganh ((cong khi) or (cong thai)) đong luc ) or ( vu cac nganh y khi đong luc ))*.