Perhaps you should try some spelling variations:
phuong quang » phung quang, thuong quang, phuong hoang
thuong quan » thuong quang, thong quan, truong quan
hien manh » hien hanh, tien manh, hieu manh
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
thong cau » thong cap, thong tu, thong cua
thong cac » trong cac, phong cach, thong cua

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 manh - anh ((thuong quan) or (phuong quang)) dung cong vang ((thong cau) OR (thong cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - anh ((thuong quan) OR (phuong quang)) dung cong vang ((thong cau) OR (thong cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - anh ((thuong quan) or (phuong quang)) dung cong vang ((thong cau) OR (thong cac))".
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - anh ((thuong quan) or (phuong quang)) dung cong vang ((thong cau) OR (thong cac))*.