Perhaps you should try some spelling variations:
tuong hieu » thuong hieu, trong hieu, guong hieu
hieu thuc » hieu thuoc, hien thuc, hieu tuc
thuc giai » thuoc giao, hoc giai, thuc thai
thue dat » thue da, thue luat, thue xuat
sanh tai » sang tai, hanh tai, anh tai
so sanh » do sanh
tue dai » tre dai, truc dai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh tai ((tue dai) or (thue dat)) tuong hieu thuc giai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh tai ((tue dai) OR (thue dat)) tuong hieu thuc giai.
• Adding a wildcard symbol may retrieve word variants: so sanh tai ((tue dai) or (thue dat)) tuong hieu thuc giai*.