Perhaps you should try some spelling variations:
dang xay » dang van
coc truc » hoc truc, cau truc, hoc thuc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
ve coc » ve cuoc, ve cac, ve co
va cua » va chua, via cua, ca cua
cua te » cua tu

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 xay) or (van xay)) hoi. hieu ve coc truc va tinh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((dang xay) OR (van xay)) hoi. hieu ve coc truc va tinh va cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((dang xay) or (van xay)) hoi. hieu ve coc truc va tinh va cua te*.