Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua thuoc » nha thuoc, cay thuoc, cua nuoc
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
nang mai » nang ma, nang tai, lang mai
va cham » va chat, va tham
xuc van » duc van, luc van, vuc van
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuoc sach)) y nang mai hoi. hieu ((va cam) OR (va cham)) xuc van thanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) y nang mai hoi. hieu ((va cam) OR (va cham)) xuc van thanh vi cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuoc sach)) y nang mai hoi. hieu ((va cam) OR (va cham)) xuc van thanh vi cua thuoc".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) y nang mai hoi. hieu ((va cam) OR (va cham)) xuc van thanh vi cua thuoc*.