Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
thanh thong » thanh thuong, thanh hong, thanh chuong
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
va thuat » ky thuat, ki thuat, va thuc
va dung » van dung, va duong, vat 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 - ((thanh thong) OR (thanh thang)) va dung cong ((van hoa) or (va thuat)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - ((thanh thong) OR (thanh thang)) va dung cong ((van hoa) OR (va thuat)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - ((thanh thong) OR (thanh thang)) va dung cong ((van hoa) or (va thuat)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - ((thanh thong) OR (thanh thang)) va dung cong ((van hoa) or (va thuat)) cao*.