Perhaps you should try some spelling variations:
trinh khong » tinh khong, trinh khung, thinh khong
sanh nganh » anh ngan, dang nganh, sach ngan
hanh trinh » canh tranh, hanh chinh
khong khi » khong he
nganh co » nganh cong, nganh hoa, nganh y
so sanh » do sanh
co hanh » co thanh, co phanh, co anh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh nganh co khi đong luc ) OR ( co hanh trinh khong khi đong luc ))~.
• Adding a wildcard symbol may retrieve word variants: (( so sanh nganh co khi đong luc ) or ( co hanh trinh khong khi đong luc ))*.