Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat duc » chat xuc, chat doc, chet duoc
tinh via » tinh gia, tinh va, tinh giao
su sach » vu sach
so sach » so sanh, bo sach, co sach
tinh vi » trinh vi, tinh voi, tinh va
y nang » ky nang, ly nang, v nang
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang x ho. hieu van chat duc va ((tinh via) OR (tinh vi)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) y nang x ho. hieu van chat duc va ((tinh via) or (tinh vi)) cua te~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) y nang x ho. hieu van chat duc va ((tinh via) or (tinh vi)) cua te*.