Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
luoc van » luoc can, luoc va, luot van
luc van » luu van, duc van, luc va
cua tre » cua te, cua triet, dua tren
han tai » hang tai, nhan tai, van tai
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
y hang » ly hang, ty hang, yu hang
ve cam » ve cham, ve cac, va cam
hang x » nang x, hoang xa, chang xu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y hang x hoi. hieu ve cam ((luoc van) OR (luc van)) han tai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y hang x hoi. hieu ve cam ((luoc van) OR (luc van)) han tai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y hang x hoi. hieu ve cam ((luoc van) OR (luc van)) han tai ((cua tre) or (cuu tre))*".