Perhaps you should try some spelling variations:
thuong luong » theo luong, cong luong, thong thuong
khung luong » hung luong, khung long, phuong luong
hanh trong » hanh trang, anh trong, hinh trong
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
trong dai » truong dai, trong doi, trong dam
manh van » anh van, menh van, canh van

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) or (chieu sang)) - hanh trong dai ((khung luong) OR (thuong luong)) manh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sang)) - hanh trong dai ((khung luong) OR (thuong luong)) manh van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu sang)) - hanh trong dai ((khung luong) OR (thuong luong)) manh van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sang)) - hanh trong dai ((khung luong) OR (thuong luong)) manh van ban*.