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, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
ve coc » ve cuoc, ve cac
luc va » duc va, tuc va, loc va
vi cuu » vi luu, vinh cuu
ve co » vo co, va co, de 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 lang) OR (ky tang)) xa hoi. hieu ((ve coc) or (ve co)) luc va tinh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky tang)) xa hoi. hieu ((ve coc) OR (ve co)) luc va tinh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) OR (ky tang)) xa hoi. hieu ((ve coc) or (ve co)) luc va tinh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) OR (ky tang)) xa hoi. hieu ((ve coc) or (ve co)) luc va tinh vi cuu tre*.