Perhaps you should try some spelling variations:
thieu nang » thien nang, thieu khang, thieu quang
sanh thieu » sach thieu, thanh thieu, hanh thiet
kham chua » kham pha
hieu van » thien van, hieu ve
hanh lai » hanh lam, hanh tai, thanh lap
so sanh » do sanh
chua va » chuc va, chua may, chuan ha
nang ma » tang ma, sang ma, nang cao
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
hieu va » hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh thieu nang ma hoi. ((((hieu van) OR (lieu va))) or (hieu va)) kham chua va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh thieu nang ma hoi. ((((hieu van) OR (lieu va))) OR (hieu va)) kham chua va hanh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh thieu nang ma hoi. ((((hieu van) OR (lieu va))) or (hieu va)) kham chua va hanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: so sanh thieu nang ma hoi. ((((hieu van) OR (lieu va))) or (hieu va)) kham chua va hanh lai cua te*.