Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dang cong » dung cong
manh toan » anh tuan, tinh toan
cua dang » cua cong, cua ban
yeu tin » hieu tin, lieu tin, yeu kien
yeu tan » yeu dan, yeu lan, yeu tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thiet ((yeu tin) OR (yeu tan)) - hanh trinh cua dang cong ((manh toan) or (thanh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thiet ((yeu tin) OR (yeu tan)) - hanh trinh cua dang cong ((manh toan) OR (thanh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thiet ((yeu tin) OR (yeu tan)) - hanh trinh cua dang cong ((manh toan) or (thanh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: thiet ((yeu tin) OR (yeu tan)) - hanh trinh cua dang cong ((manh toan) or (thanh toan)) cau*.