Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
dang ha » dong ha, dung ha, lang ha
dang xa » dang xay, lang xa, dang va
cua tu » cua tuc, cua su, cua cu

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 thue ((dang xa) OR (dang ha)) hoi. hieu ve pham duc van thanh vai ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thue ((dang xa) OR (dang ha)) hoi. hieu ve pham duc van thanh vai ((cua tre) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thue ((dang xa) OR (dang ha)) hoi. hieu ve pham duc van thanh vai ((cua tre) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: su sach thue ((dang xa) OR (dang ha)) hoi. hieu ve pham duc van thanh vai ((cua tre) or (cua tu))*.