Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, thien tinh, lieu tinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
manh tung » manh hung, thanh tung
dung cong » dung trong
cong luan » tong luan, cong tuan, dong luan
anh nang » ganh nang, anh bang, anh dang
cua dung » cua dang, cua dong, qua dung

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 (chieu tinh)) - ((manh tung) or (anh nang)) cua dung cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (chieu tinh)) - ((manh tung) OR (anh nang)) cua dung cong luan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) OR (chieu tinh)) - ((manh tung) or (anh nang)) cua dung cong luan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) OR (chieu tinh)) - ((manh tung) or (anh nang)) cua dung cong luan van ban*.