Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
luc va » tuc va, loc va
vi cuu » vi luu, vinh cuu

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) or (thuat sach)) y nang xa hoi. hieu van cau ((luc va) or (duc va)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat sach)) y nang xa hoi. hieu van cau ((luc va) OR (duc va)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat sach)) y nang xa hoi. hieu van cau ((luc va) or (duc va)) hanh vi cuu tre*.