Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu van » hieu va, thien van, lieu va
van chat » cao chat
tinh bai » tinh bac, tinh hai, hinh bai
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang xa hoi. hieu van chat ((tuc va) or (duc va)) tinh bai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. hieu van chat ((tuc va) OR (duc va)) tinh bai ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. hieu van chat ((tuc va) or (duc va)) tinh bai ((cua tre) or (su triet))*.