Perhaps you should try some spelling variations:
phuong dan » phuong danh, phuong doan, huong dan
tieu tinh » trieu tinh, tieu trinh, lieu tinh
hanh dong » ha dong
luan bang » luan nang, luan tang, tuan bang
anh dong » anh huong, anh son
luan ban » luan van, luan san, luan han
dan toan » van toan, dan than, manh toan
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: theo tieu tinh - ((hanh dong) or (anh dong)) ((luan bang) OR (luan ban)) phuong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - ((hanh dong) OR (anh dong)) ((luan bang) OR (luan ban)) phuong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu tinh - ((hanh dong) or (anh dong)) ((luan bang) OR (luan ban)) phuong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - ((hanh dong) or (anh dong)) ((luan bang) OR (luan ban)) phuong dan toan ban*.