Perhaps you should try some spelling variations:
dang xay » dang van, van xay
coc truc » hoc truc, cau truc, hoc thuc
vu sach » vu bach, su sach, vu khach
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
dang xa » lang xa, dang ha, dang va
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
ve coc » ve cuoc, ve cac, ve co
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (so sach)) ky ((dang xa) or (dang xay)) hoi. hieu ve coc truc va tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) ky ((dang xa) OR (dang xay)) hoi. hieu ve coc truc va tinh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) ky ((dang xa) or (dang xay)) hoi. hieu ve coc truc va tinh vi cua tre*.