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
hanh tai » thanh tai, hang tai, han tai
hieu van » thien van, lieu va, hieu ve
hanh lai » hanh lam, thanh lap, thanh loi
so sanh » do sanh
chua va » chuc va, chua may, chuan ha
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
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 (hieu va)) kham chua va ((hanh lai) OR (hanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh thieu nang ma hoi. ((hieu van) OR (hieu va)) kham chua va ((hanh lai) OR (hanh tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh thieu nang ma hoi. ((hieu van) or (hieu va)) kham chua va ((hanh lai) OR (hanh tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: so sanh thieu nang ma hoi. ((hieu van) or (hieu va)) kham chua va ((hanh lai) OR (hanh tai)) cua te*.