Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trong » hanh trang, anh trong, hinh trong
dai nhung » ai nhung, dap nhung, vai nhung
dai khung » dai khong, dam khung, dai khoang
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
toan cao » toan tap
toan ban » van ban

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 nganh - hanh trong ((dai nhung) OR (dai khung)) cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - hanh trong ((dai nhung) OR (dai khung)) cong san ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - hanh trong ((dai nhung) OR (dai khung)) cong san ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - hanh trong ((dai nhung) OR (dai khung)) cong san ((toan cao) or (toan ban))*.