Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach ty, sach kem
van anh » tuan anh, van minh
cuu tre » cua tre, cau tren, cau treo
nang o » nang co, nang ho, nang ro
vi cuu » vi luu, vinh cuu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ky) OR (sach y)) nang o hoi. hieu van cham soc ((van anh) or (van thanh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sach y)) nang o hoi. hieu van cham soc ((van anh) OR (van thanh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ky) OR (sach y)) nang o hoi. hieu van cham soc ((van anh) or (van thanh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ky) OR (sach y)) nang o hoi. hieu van cham soc ((van anh) or (van thanh)) vi cuu tre*.