Perhaps you should try some spelling variations:
thong thuong » thong thong, hang thuong, cong thuong
thuong luong » theo luong, cong luong
hanh trinh » canh tranh, hanh chinh
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
tai toan » bai toan, tap toan, tai tuan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - ((hanh tang) or (hanh trinh)) cua ((thuong luong) OR (thong thuong)) tai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((hanh tang) OR (hanh trinh)) cua ((thuong luong) OR (thong thuong)) tai toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - ((hanh tang) or (hanh trinh)) cua ((thuong luong) OR (thong thuong)) tai toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((hanh tang) or (hanh trinh)) cua ((thuong luong) OR (thong thuong)) tai toan cao*.