Perhaps you should try some spelling variations:
khong huong » khong xuong, thong huong, thong thuong
hanh trang » thanh trung, canh tranh, hanh trinh
hanh tang » anh tang, hanh mang, hanh tung
cua khong » hua khong, cua phuong, cua thuong
hoc thuc » hoc huu
toan cau » toan ban, toan tap, toan tai
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 thuc hanh - ((hanh tang) OR (hanh trang)) cua khong huong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuc hanh - ((hanh tang) OR (hanh trang)) cua khong huong dan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thuc hanh - ((hanh tang) OR (hanh trang)) cua khong huong dan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc thuc hanh - ((hanh tang) OR (hanh trang)) cua khong huong dan ((toan cau) or (toan cao))*.