Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
nong cong » cong cong, nang cong, dong cong
tong cong » trong cong, cong cong, dung cong
dang hanh » dang thanh, ban hanh, dang van
doc hieu » toc thieu, hoc hien
hanh ca » hanh cac, hanh cat, hanh cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc thieu)) nganh - hanh tang luan ((nong cong) OR (tong cong)) dang hanh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) nganh - hanh tang luan ((nong cong) OR (tong cong)) dang hanh ca*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc thieu)) nganh - hanh tang luan ((nong cong) OR (tong cong)) dang hanh ca*".