Perhaps you should try some spelling variations:
dong khoa » duong khoa, dung khoa, dong hoa
van thanh » ban thanh, van tuan
chua tri » chua trieu, chua tivi, huu tri
thanh va » thanh van, hanh va, thanh ha
khoa hoi » khoan hoi, khoa hoc, khoa doi
hieu thi » sieu thi, hieu chi, hiep thi
so sach » so sanh, co sach, hoc sach
xuc van » duc van, luc van, vuc van
thi hai » thi mai, thi hanh
hai xuc » hai cuc, hai xu, chat xuc
ky dong » ly dong, ky dang, ky cong
bo sach » co sach, hoc sach
chu tri » chu thi, chu tai, cu tri

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 (bo sach)) ky dong khoa hoi. hieu thi hai xuc van thanh va ((chua tri) OR (chu tri))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ky dong khoa hoi. hieu thi hai xuc van thanh va ((chua tri) OR (chu tri)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (bo sach)) ky dong khoa hoi. hieu thi hai xuc van thanh va ((chua tri) OR (chu tri))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) ky dong khoa hoi. hieu thi hai xuc van thanh va ((chua tri) OR (chu tri))*.