Perhaps you should try some spelling variations:
thuong duong » tuong duong, thuong luong, chuong duong
hien quang » dien quang, hien quan, hieu quang
bien quang » dien quang, trien quang, lien quan
hanh trinh » hanh chinh
duong van » duong va, luong va, dang van
van toan » van tuan, van tan, van thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien quang) or (bien quang)) - ((hanh trinh) or (canh tranh)) va thuong duong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien quang) OR (bien quang)) - ((hanh trinh) OR (canh tranh)) va thuong duong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien quang) or (bien quang)) - ((hanh trinh) or (canh tranh)) va thuong duong van toan ban*.