Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
nhung tuong » nhung huong, nhung phuong, hung vuong
truong ham » truong dai, truong dao, truong va
truong cao » truong dai
hien xanh » hien hanh, hien nhanh, chieu xanh
tuong dan » huong dan, tung dan, xuong dan
dan chinh » dang chinh, lan chinh, van chinh
chinh tai » chinh tri

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 (thien thanh)) - thanh ((truong ham) OR (truong cao)) nhung tuong dan chinh tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (thien thanh)) - thanh ((truong ham) OR (truong cao)) nhung tuong dan chinh tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (thien thanh)) - thanh ((truong ham) OR (truong cao)) nhung tuong dan chinh tai".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (thien thanh)) - thanh ((truong ham) OR (truong cao)) nhung tuong dan chinh tai*.