Perhaps you should try some spelling variations:
phap khang » phap nang, phap phan, phap tang
phu khang » phuc khanh, thu hang, huu khang
thien van » thi van
nam thuoc » nam thuc, nam thu, nha thuoc
thu sach » tu sach, thuat sach, thuoc sach
thuoc va » thuc va, thuoc ma, thuong va
danh sai » dung sai, danh bat, danh dau
va danh » va dinh, va dan, va hanh
su viet » so viet
ha hoi » hoa hoi, ha noi, xa hoi
sai su » lai su, sat su, tai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((phu khang) or (phap khang)) ha hoi. thien van nam thuoc va danh sai su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((phu khang) OR (phap khang)) ha hoi. thien van nam thuoc va danh sai su viet.
• Adding a wildcard symbol may retrieve word variants: thu sach ((phu khang) or (phap khang)) ha hoi. thien van nam thuoc va danh sai su viet*.