Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
dung cong » dung trong
theo chu » theo chieu, cho chu, chao chu
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
san toan » van toan, dan toan, manh toan
van tuan » van quan, van ban, anh tuan
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chu) or (ho chieu)) tinh - hanh trinh va dung cong ((san toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chu) OR (ho chieu)) tinh - hanh trinh va dung cong ((san toan) OR (van tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chu) or (ho chieu)) tinh - hanh trinh va dung cong ((san toan) or (van tuan)) cau*.