Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tham soc » cham soc, tham nuoc, thai son
nang ma » tang ma, sang ma, nang cao
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ca tren » cau tren, cu tren, la tren
soc va » hoc va, loc va, doc va
va ca » 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: thu sach y ((nang x) or (nang ma)) hoi. lieu va tham soc va hanh va ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang x) OR (nang ma)) hoi. lieu va tham soc va hanh va ca tren*.