Perhaps you should try some spelling variations:
thiet nang » nhiet nang, thien nang, thi nang
kham chua » kham pha
van kham » van tham, va kham, van khai
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, lieu va
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 danh, co hanh, do hanh
nang ma » tang ma, sang ma, nang cao
so sanh » do sanh
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 hanh) OR (so sanh)) thiet nang ma hoi. hieu van kham chua va hanh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so hanh) OR (so sanh)) thiet nang ma hoi. hieu van kham chua va hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((so hanh) OR (so sanh)) thiet nang ma hoi. hieu van kham chua va hanh tai cua te*.