Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
phuong dan » phuong danh, phuong doan, huong dan
cua nhung » va nhung
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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) or (toc thieu)) tinh - ((hanh tranh) OR (hanh trinh)) cua nhung phuong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (toc thieu)) tinh - ((hanh tranh) OR (hanh trinh)) cua nhung phuong dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hien) or (toc thieu)) tinh - ((hanh tranh) OR (hanh trinh)) cua nhung phuong dan than cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (toc thieu)) tinh - ((hanh tranh) OR (hanh trinh)) cua nhung phuong dan than cao*.