Perhaps you should try some spelling variations:
tuoc may » hoc may, duoc ma, tao may
bac tuoc » bach tuoc, tac thuoc, bac hoc
su sach » so sach, vu sach
tinh di » tinh doi, trinh di, tinh da
van bac » van ban, van bao, van hac
thi van » thi lan, thi hanh, thi nang
so sanh » do sanh
vu nang » vuc nang, va nang, vu dang
cuu tre » cua tre, cau tren, cau treo
v nang » va nang, van nang, voi nang
di cuu » di cau, di cua, dinh cuu

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) or (so sanh)) ((v nang) OR (vu nang)) xa hoi. thi van bac tuoc may tinh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ((v nang) OR (vu nang)) xa hoi. thi van bac tuoc may tinh di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) ((v nang) OR (vu nang)) xa hoi. thi van bac tuoc may tinh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ((v nang) OR (vu nang)) xa hoi. thi van bac tuoc may tinh di cuu tre*.