Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
hien xanh » hien hanh, hien nhanh, chieu xanh
trung hoc » trung quoc
tuong dan » huong dan, tung dan, xuong dan
trung ha » trung tam, trung cap
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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 - hanh ((trung ha) OR (trung hoc)) nhung tuong dan ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((trung ha) OR (trung hoc)) nhung tuong dan ((toan tai) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((trung ha) OR (trung hoc)) nhung tuong dan ((toan tai) or (toan ban))*".