Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
trinh luan » trinh luat, trinh quan, trinh han
tien tinh » tien thinh, tien trinh, thien tinh
dang cong » dung cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tinh cua » trinh cua, sinh cua, tinh chat
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 ((thieu tinh) or (tien tinh)) - hanh ((trinh luan) or (tinh cua)) dang cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (tien tinh)) - hanh ((trinh luan) OR (tinh cua)) dang cong manh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) or (tien tinh)) - hanh ((trinh luan) or (tinh cua)) dang cong manh toan ban*.