Perhaps you should try some spelling variations:
cac thoi » cac toi, cac hop, cac tro
su sach » so sach, vu sach
cac thu » cach thuc
tinh vi » trinh vi, tinh voi, tinh va
hieu ve » hieu va, hieu van
cac khu » cac khoi, cac kieu
sach ly » sach y, sach lo, sach ty
vi cua » vai cua, di cua
cua te » cua tu
van xa » van xay, van ha, dan xa
ly van » le van, ly va, ly von

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 ly van xa hoi. hieu ve ((cac khu) or (((cac thu) or (cac thoi)))) may tinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly van xa hoi. hieu ve ((cac khu) OR (((cac thu) OR (cac thoi)))) may tinh vi cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ly van xa hoi. hieu ve ((cac khu) or (((cac thu) or (cac thoi)))) may tinh vi cua te*.