Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
cong quang » luong quang, thong quang, duong quang
cong vang » cong lang, cong ngang, cong san
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va
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) OR (sinh cua)) nhung ((cong vang) or (cong quang)) tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh ((tinh cua) OR (sinh cua)) nhung ((cong vang) OR (cong quang)) tuan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - hanh ((tinh cua) OR (sinh cua)) nhung ((cong vang) or (cong quang)) tuan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh ((tinh cua) OR (sinh cua)) nhung ((cong vang) or (cong quang)) tuan cao*.