Perhaps you should try some spelling variations:
thanh tung » thanh cong
chuong dan » huong dan, chuong han, chuong dong
hien xanh » hien hanh, hien nhanh, chieu xanh
va trong » va truong, va thong, va trung
va tuong » va thuong, va thong, xa truong
dan toan » van toan, dan than, manh toan
toan tap » toan 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 - thanh tung ((va trong) OR (va tuong)) chuong dan toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh tung ((va trong) OR (va tuong)) chuong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh tung ((va trong) OR (va tuong)) chuong dan toan tap*.