Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
van thuong » va thuong, van chuong, van phuong
hoc thien » hoc hien, hoc thieu, hoc thiet
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - hanh tang luan van thuong ((dan than) OR (ban than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - hanh tang luan van thuong ((dan than) OR (ban than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh tang luan van thuong ((dan than) OR (ban than)) cau*.