Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
thanh tran » thanh trang, thanh toan, thanh tra
tran thuat » trong thuat, trien thuat, tran tuan
thuat dung » thuat hung, thuat ung, thuat xung
dung cong » dung trong
van toan » van tuan, van thanh, manh toan
van tan » van tuan, van ban, van tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((khien tinh) or (chieu tinh)) - thanh tran thuat dung cong ((van toan) OR (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((khien tinh) OR (chieu tinh)) - thanh tran thuat dung cong ((van toan) OR (van tan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((khien tinh) or (chieu tinh)) - thanh tran thuat dung cong ((van toan) OR (van tan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((khien tinh) or (chieu tinh)) - thanh tran thuat dung cong ((van toan) OR (van tan)) cau*.