Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
chat xuc » chat huu, cam xuc, chao xu
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
cac xuc » cam xuc, cac nuoc, cac cuoc
cua tre » cuu tre, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
cam dan » cac dan, ca dan, nam dan
dan vi » doan vi, don vi, dan va
cua te » cua tu

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