Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
khien tinh » thien tinh, khien thich, bien tinh
hoc khien » hoc hien, hoc nghien, hoc thieu
duong dan » duong dang, huong dan, dung dan
duong van » duong va, luong va, dang van
thang va » hang va, trang va, thong va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc khien tinh - thanh thang va thuong ((duong dan) or (duong van)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien tinh - thanh thang va thuong ((duong dan) OR (duong van)) phan tu.
• Adding a wildcard symbol may retrieve word variants: hoc khien tinh - thanh thang va thuong ((duong dan) or (duong van)) phan tu*.