Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
trinh cong » trinh dung
cong quang » luong quang, thong quang, duong quang
hanh tang » hanh trang, anh tang, hanh mang
cua trinh » qua trinh, cua tinh, xuan trinh
tang cua » mang cua, hang cua, tang luan
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 - hanh tang cua trinh cong quang ((toan tap) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh tang cua trinh cong quang ((toan tap) OR (han tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh tang cua trinh cong quang ((toan tap) or (han tap))*.