Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh phan » thanh phan, anh phan, hanh han
hoc hieu » hoc thieu, hoc hien, doc hieu
hanh san » thanh san, khach san, thanh son
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

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 manh - ((hanh phan) or (hanh san)) va thong cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hanh phan) OR (hanh san)) va thong cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh phan) or (hanh san)) va thong cong dan than tap*.