Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty dang » ty xang, ky dang, ty hang
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duc van » duc va, duc manh, duc phan
cuu tre » cua tre, cau tren, cau treo
cua su » qua su

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 ty dang xa hoi. hieu ve pham ((duc tan) or (duc van)) hanh vai ((cuu tre) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty dang xa hoi. hieu ve pham ((duc tan) OR (duc van)) hanh vai ((cuu tre) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: su sach ty dang xa hoi. hieu ve pham ((duc tan) or (duc van)) hanh vai ((cuu tre) or (cua su))*.