Perhaps you should try some spelling variations:
su sach » so sach
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
vu sach » vu bach, vu khach
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
va coc » va cuoc, va cac, va hoc
va co » vo co

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) or (vu sach)) ky lang xa hoi. hieu ((va coc) or (va co)) luc va tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky lang xa hoi. hieu ((va coc) OR (va co)) luc va tinh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky lang xa hoi. hieu ((va coc) or (va co)) luc va tinh vi cua tre*.