Perhaps you should try some spelling variations:
thieu nang » thien nang, thieu khang, thieu quang
kham chua » kham pha
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
nang ma » tang ma, sang ma, nang cao
va kham » va cham, va khao, va tham
chua va » chuc va, chua may, chuan ha
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, bai cua
lai cua » dai cua, hai cua, lai chau
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (co sach)) thieu nang ma hoi. lieu va kham chua va danh ((vai cua) or (lai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) thieu nang ma hoi. lieu va kham chua va danh ((vai cua) OR (lai cua)) te.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) thieu nang ma hoi. lieu va kham chua va danh ((vai cua) or (lai cua)) te*.