Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
cong quang » luong quang, thong quang, duong quang
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
cong vang » cong lang, cong ngang, cong dong
tinh cua » trinh cua, sinh cua, tinh chat
cong san » cong tac
tuan cao » toan cao, juan cao, quang cao

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 tinh cua nhung ((((cong vang) OR (cong san))) or (cong quang)) tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh tinh cua nhung ((((cong vang) OR (cong san))) OR (cong quang)) tuan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - hanh tinh cua nhung ((((cong vang) OR (cong san))) or (cong quang)) tuan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh tinh cua nhung ((((cong vang) OR (cong san))) or (cong quang)) tuan cao*.