Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
thuat ung » thuat dung, thuat hung, thuat xung
ho chieu » theo chieu, doi chieu, mot chieu
ung cong » dung cong, luong cong, duong cong
bai toan » bai tap
van tan » van tuan, van ban, van tai

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - hanh trinh thuat ung cong ((bai toan) OR (van tan)) cau~.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - hanh trinh thuat ung cong ((bai toan) or (van tan)) cau*.