Perhaps you should try some spelling variations:
benh khoe » benh kho, benh khoa, benh khong
khoe cua » kho cua, khien cua, hoc cua
doc sach » hoc sach, toc sach, nuoc sach
can benh » cac benh, san benh, con benh
luoc can » luc canh, hoc can, luoc dai
te sach » toc sach
van tam » van tham, van tan, van lam
van tai » von tai, van tuan
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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) or (doc sach)) ky nang x hoi. hieu ((van tam) OR (van tai)) luoc can benh khoe cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) ky nang x hoi. hieu ((van tam) OR (van tai)) luoc can benh khoe cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) ky nang x hoi. hieu ((van tam) OR (van tai)) luoc can benh khoe cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) ky nang x hoi. hieu ((van tam) OR (van tai)) luoc can benh khoe cua te*.