Perhaps you should try some spelling variations:
nhiet tach » chiet tach
manh trung » manh tung, thanh trung, manh hung
hoc nhiet » hoc thiet, hoc nghien, hoc hien
chan dung » van dung
duong van » duong va, luong va, dang van
dan dung » van dung, tin dung, ap dung
ban tap » bai tap, han tap, ban tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nhiet tach - manh trung ((chan dung) or (dan dung)) duong van ban tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhiet tach - manh trung ((chan dung) OR (dan dung)) duong van ban tap.
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - manh trung ((chan dung) or (dan dung)) duong van ban tap*.