Perhaps you should try some spelling variations:
tieu trinh » tien trinh, tien thinh, trieu tinh
thanh tung » thanh cong
tieu tinh » trieu tinh, lieu tinh, kieu tinh
anh quang » anh xquang, anh quan, nhanh quang
luan nang » luan van, van nang, luan san
nang nong » nang song, hang nong, nang dong
nong dan » cong dan, nong san, nguong dan
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) OR (tieu trinh)) - ((thanh tung) or (anh quang)) luan nang nong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu tinh) OR (tieu trinh)) - ((thanh tung) OR (anh quang)) luan nang nong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu tinh) OR (tieu trinh)) - ((thanh tung) or (anh quang)) luan nang nong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu tinh) OR (tieu trinh)) - ((thanh tung) or (anh quang)) luan nang nong dan toan ban*.