Perhaps you should try some spelling variations:
trang thanh » tran thanh, tang thanh, trong thanh
trung thanh » truong thanh
nhung huong » nhung phuong, nhung tuong, nhung cong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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)) - thanh ((trang thanh) OR (trung thanh)) nhung huong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - thanh ((trang thanh) OR (trung thanh)) nhung huong dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - thanh ((trang thanh) OR (trung thanh)) nhung huong dan than ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - thanh ((trang thanh) OR (trung thanh)) nhung huong dan than ban*.