Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
trinh cong » trinh dung
cong quang » luong quang, thong quang, duong quang
hien hanh » dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
qua trinh » qua kinh
tang qua » tang quan, tang cua, tang quy
toan tap » toan ban
han tap » han tai, nhan tai, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien nhanh) OR (hien hanh)) - hanh tang qua trinh cong quang ((toan tap) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - hanh tang qua trinh cong quang ((toan tap) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) OR (hien hanh)) - hanh tang qua trinh cong quang ((toan tap) or (han tap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) OR (hien hanh)) - hanh tang qua trinh cong quang ((toan tap) or (han tap))*.