Perhaps you should try some spelling variations:
sang dieu » dang dieu, hang dien
vien cac » vien bach, vien dai, vien da
dieu tra » dieu tri, kiem tra, dieu cua
va sang » van sang, vua sang, va nang
tu sach » thu sach, te sach, tu cach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
su sach » so sach, vu sach
xuc va » duc va, tuc va, luc va
tra te » tra tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ky lang xa hoi. hieu ((vien cac) or (va cac)) xuc va sang dieu tra te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky lang xa hoi. hieu ((vien cac) OR (va cac)) xuc va sang dieu tra te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky lang xa hoi. hieu ((vien cac) or (va cac)) xuc va sang dieu tra te*.