Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
suat huong » luat huong, sat huong, luat thuong
trong dang » truong dang, trong dan, trong dong
hien xanh » hien hanh, hien nhanh, chieu xanh
luat dung » suat dung, luat chung, luat quang
dang toan » dang tran, dan toan, dung toan
toan cao » toan ban, toan tap

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 trinh ((luat dung) or (suat huong)) trong dang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trinh ((luat dung) OR (suat huong)) trong dang toan cao*.