Perhaps you should try some spelling variations:
thong xuong » khong xuong, thong duong, thong huong
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trinh » canh tranh, hanh chinh
trinh thi » trinh tai, dinh thi, trinh tu
thi thong » thi thuong, thi hong, thi khong
hoc hieu » hoc thieu, hoc hien, doc hieu
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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 nganh - hanh trinh thi thong xuong ((dan toan) OR (dan than)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - hanh trinh thi thong xuong ((dan toan) OR (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh trinh thi thong xuong ((dan toan) OR (dan than)) cao*.