Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trang » canh tranh, hanh trinh, minh trang
hieu hanh » dieu hanh, hien hanh, hieu manh
doc hieu » toc thieu, hoc thieu, hoc hien
ban cong » bang cong, van cong, phan cong
cong tam » cong tac, cong tan, cong nam
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: doc hieu hanh - ((hanh trang) or (thanh trung)) cua ban cong tam ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu hanh - ((hanh trang) OR (thanh trung)) cua ban cong tam ((toan cao) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu hanh - ((hanh trang) or (thanh trung)) cua ban cong tam ((toan cao) or (van ban))*.