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

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) OR (hanh va)) chua 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) OR (hanh va)) chua 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) OR (hanh va)) chua 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) OR (hanh va)) chua tri*.