Perhaps you should try some spelling variations:
trung thuat » thuong thuat, trung tuan, trung thuc
trong thuat » trong hoat, trong thu, trong phat
tuong thong » thong thong, tong thong, tuong tuong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
thong dan » thong van, tuong dan, thong den
dan toan » van toan, dan than, manh toan
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) or (hien hanh)) - thanh ((trung thuat) OR (trong thuat)) tuong thong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - thanh ((trung thuat) OR (trong thuat)) tuong thong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - thanh ((trung thuat) OR (trong thuat)) tuong thong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - thanh ((trung thuat) OR (trong thuat)) tuong thong dan toan ban*.