Perhaps you should try some spelling variations:
thieu lang » hieu lang, thieu khang, thieu quang
hanh trinh » hanh chinh
hoc thieu » toc thieu, hoc hien
ban cong » bang cong, van cong, phan cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap
qua ban » cua ban, qua quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu lang - ((hanh trinh) or (canh tranh)) qua ban cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu lang - ((hanh trinh) OR (canh tranh)) qua ban cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu lang - ((hanh trinh) or (canh tranh)) qua ban cong san toan cao*.