Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
hanh trinh » canh tranh, hanh chinh
thuat dung » thuat hung, thuat ung, thuat xung
dung huong » dung thuong, dung phuong, dong huong
hien xanh » hien hanh, hien nhanh, chieu xanh
toan tai » toan tap, doanh tai, von tai
toan cao » toan tap
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 trinh thuat dung huong dan ((((toan tai) or (toan cao))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trinh thuat dung huong dan ((((toan tai) OR (toan cao))) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh thuat dung huong dan ((((toan tai) or (toan cao))) or (toan ban))*.