Perhaps you should try some spelling variations:
trong cuong » trong chuong, trong cong, trong luong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
huong cua » dung cua
cua trong » cua truong, cua trung, qua trong
cuong do » cuong vo, huong doi, duong dao
do van » dao van, vo van, so van

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 xanh) or (hien hanh)) - anh huong cua trong cuong do van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - anh huong cua trong cuong do van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - anh huong cua trong cuong do van ban*.