Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat xuc » chat huu, cam xuc, chao xu
te sach » toc sach
doan vi » doan va, don vi, doan thi
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
xuc va » duc va, tuc va, luc va
dan vi » don vi, dan va, gan vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) OR (ky nang)) xa hoi. hieu van chat xuc va ((dan vi) or (doan vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ky nang)) xa hoi. hieu van chat xuc va ((dan vi) OR (doan vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ky nang)) xa hoi. hieu van chat xuc va ((dan vi) or (doan vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) OR (ky nang)) xa hoi. hieu van chat xuc va ((dan vi) or (doan vi)) cua tre*.