Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
nuoc sach » nguoi sach, hoc sach, cuoc cach
benh dai » benh tai, benh noi, binh dan
hieu van » hieu va, thien van, lieu va
cao duc » dao duc, cao suc, giao duc
duc ban » duc tan, duc van, dua ban
van cao » van dao, van bao, van hao
y nang » ky nang, ly nang, v nang
ben di » ben dai, bien di, den di
cua su » qua su
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) OR (nuoc sach)) y nang x hoi. hieu van cao duc ban ((ben di) or (benh dai)) cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (nuoc sach)) y nang x hoi. hieu van cao duc ban ((ben di) OR (benh dai)) cua su*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (nuoc sach)) y nang x hoi. hieu van cao duc ban ((ben di) or (benh dai)) cua su*".