Perhaps you should try some spelling variations:
su sach » so sach, vu sach
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
va coc » va cuoc, va cac, va hoc
luc va » duc va, tuc va, loc va
vi cuu » vi luu, vinh cuu
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 ((ky dang) or (ky tang)) xa hoi. hieu ((va coc) or (va co)) luc va tinh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky dang) OR (ky tang)) xa hoi. hieu ((va coc) OR (va co)) luc va tinh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dang) or (ky tang)) xa hoi. hieu ((va coc) or (va co)) luc va tinh vi cuu tre*.