Perhaps you should try some spelling variations:
su sach » so sach, vu sach
van cac » van cau, van bac, dan cac
tuc cua » thuc cua, tac cua, luc cua
van hac » van hoc, van ha, van hai
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
tuc ca » tuc cac, tuc xa, tuc co
ma hoi » mai hoi, xa hoi, ma hoa
dan vi » doan vi, don vi, dan va
vi cuu » vi luu, vinh cuu

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 y nang ma hoi. thi ((van cac) OR (van hac)) ((tuc ca) OR (tuc cua)) dan vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. thi ((van cac) OR (van hac)) ((tuc ca) or (tuc cua)) dan vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. thi ((van cac) OR (van hac)) ((tuc ca) or (tuc cua)) dan vi cuu tre*.