Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
te sach » toc sach
ly nang » ky nang, ly hang, ly vang
cac dac » cac dan, cac dai, cac bac
dan thi » dang thi, tran thi, dinh thi
thi huu » thi hue, thi thuy
huu tre » huu tri, cuu tre, huu them
y nang » ky nang, v nang, may nang
dac va » duc va, day va, dat va
va dan » ca dan, va dao, va dau

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: ((tu sach) OR (te sach)) ((y nang) OR (ly nang)) xa hoi. lieu va cac dac va dan thi huu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ((y nang) or (ly nang)) xa hoi. lieu va cac dac va dan thi huu tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ((y nang) or (ly nang)) xa hoi. lieu va cac dac va dan thi huu tre*.