Perhaps you should try some spelling variations:
tuong hieu » thuong hieu, trong hieu, guong hieu
can tuong » ban tuong, cac tuong, van tuong
hieu thuc » hieu thuoc, hien thuc, hieu tuc
thuc giai » thuoc giao, hoc giai, thuc thai
tri tren » thi tren, tai tren, trinh tren
su sach » so sach, vu sach
tri tre » tri tue, tuoi tre, thi tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((tri tre) or (tri tren)) can tuong hieu thuc giai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tri tre) OR (tri tren)) can tuong hieu thuc giai.
• Adding a wildcard symbol may retrieve word variants: su sach ((tri tre) or (tri tren)) can tuong hieu thuc giai*.