Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
cong luong » cong thuong, nang luong, cong dong
luong dan » huong dan, luong dao, luong van
minh cua » manh cua, sinh cua, dinh cua
tinh cua » trinh cua, sinh cua, tinh chat
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu nganh) or (chieu sach)) - hoang ((minh cua) OR (tinh cua)) cong luong dan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (chieu sach)) - hoang ((minh cua) OR (tinh cua)) cong luong dan khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu nganh) or (chieu sach)) - hoang ((minh cua) OR (tinh cua)) cong luong dan khan cap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (chieu sach)) - hoang ((minh cua) OR (tinh cua)) cong luong dan khan cap*.