Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
trinh toan » tinh toan, thanh toan, trinh han
thuat ung » thuat dung, thuat hung, thuat xung
chi xanh » chi anh, chi danh, chi hanh
ung cong » dung cong, luong cong, duong cong
toan cao » toan ban, toan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - ((hanh trinh) or (canh tranh)) thuat ung cong trinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((hanh trinh) OR (canh tranh)) thuat ung cong trinh toan cao*.