Perhaps you should try some spelling variations:
tong huong » thong huong, tong thuong, cong huong
hieu nganh » vien nganh, hiem ngan, hieu manh
hien hanh » dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh cua » trinh cua, sinh cua, tinh chat
cua tong » cua cong, cua dong, cua nong
dan toan » van toan, dan than, manh toan
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 ((hieu nganh) or (hien hanh)) - hanh tinh cua tong huong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (hien hanh)) - hanh tinh cua tong huong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (hien hanh)) - hanh tinh cua tong huong dan toan cao*.