Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
thien dang » thien bang, thien danh, thien nang
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh han » hanh nhan, hanh phan, hanh san
va thong » va thuong, va phuong, he thong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap
han va » hang va, hanh va, nhan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((thieu xanh) or (thien dang))) or (hieu manh)) - hanh han va thong cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu xanh) OR (thien dang))) OR (hieu manh)) - hanh han va thong cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu xanh) or (thien dang))) or (hieu manh)) - hanh han va thong cong dan than tap*.