Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cau trieu » cac trieu, cau triet, chua trieu
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
tham duc » pham duc, tham du, than duc
va thanh » gia thanh, ban thanh, va tinh
tu tang » tuc tang, tu trang, tu tong
tang ky » dang ky, trong ky, tang khu
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thuat

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu tang ky ((lang van) OR (tang van)) hoi. hieu va tham duc va thanh hai ((cau thi) or (cau trieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tang ky ((lang van) OR (tang van)) hoi. hieu va tham duc va thanh hai ((cau thi) OR (cau trieu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu tang ky ((lang van) OR (tang van)) hoi. hieu va tham duc va thanh hai ((cau thi) or (cau trieu))".
• Adding a wildcard symbol may retrieve word variants: tu tang ky ((lang van) OR (tang van)) hoi. hieu va tham duc va thanh hai ((cau thi) or (cau trieu))*.