Perhaps you should try some spelling variations:
thiet tinh » thien tinh, thuyet tinh, khien tinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
thanh tuan » thanh xuan, thanh thanh, anh tuan
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
dung cong » dung trong
tuan thu » toan thuc, van thu
thu dung » thuy dung, thuc dung, thu dang
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thiet tinh) or (chieu tinh)) - thanh tuan thu dung cong thanh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tinh) OR (chieu tinh)) - thanh tuan thu dung cong thanh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tinh) or (chieu tinh)) - thanh tuan thu dung cong thanh toan ban*.