Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu
hanh tang » hanh trang, anh tang, hanh mang
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
tang va » trang va, tang van, thang 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) or (hoc hien)) manh - hanh tang va thong cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) manh - hanh tang va thong cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) manh - hanh tang va thong cong dan than tap*.