Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
canh manh » lanh manh, canh tranh, van manh
cong cong » cong dong, trong cong, dung cong
cong pham » cong phan, chong phap, cong ha
pham xuan » pham luan, pham quang, pham van
xuan ban » xuan can, xuan tan, xuat 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 thiet tach - ((canh manh) or (cach mang)) cua cong cong pham xuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - ((canh manh) OR (cach mang)) cua cong cong pham xuan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - ((canh manh) or (cach mang)) cua cong cong pham xuan ban*.