Perhaps you should try some spelling variations:
thiet nang » nhiet nang, thien nang, thi nang
kham chua » kham pha
hieu van » hieu va, thien van, hieu ve
hanh tai » thanh tai, hang tai, han tai
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
chua va » chuc va, chua may, chuan ha
so hanh » so sanh, so danh, do hanh
nang ma » tang ma, sang ma, nang cao
co hanh » co thanh, co phanh, co anh
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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

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