Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
thong dan » thong van, tuong dan, thong den
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien
va thong » va thuong, va phuong, he thong
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) or (doc hieu)) manh - ((canh tranh) or (hanh trinh)) va thong thong dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (doc hieu)) manh - ((canh tranh) OR (hanh trinh)) va thong thong dan phan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (doc hieu)) manh - ((canh tranh) or (hanh trinh)) va thong thong dan phan cau*.