Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
hanh trinh » canh tranh, hanh chinh
thuat dung » thuat hung, thuat ung, thuat xung
dung cong » dung trong
khi sinh » ki sinh, thi sinh, khoe sinh
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi khi sinh - hanh trinh thuat dung cong ((dan toan) OR (dan than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi khi sinh - hanh trinh thuat dung cong ((dan toan) OR (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: doi khi sinh - hanh trinh thuat dung cong ((dan toan) OR (dan than)) cau*.