Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
mai khoi » mai khoa, tai khoa, cac khoi
cau tren » cu tren, ca tren, cau treo
danh vai » danh sai, danh va, doanh van
dau tren » dau tien, dat tren, dau tieng
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
mai hoi » dai hoi, lai hoi, mai doi
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
soc va » hoc va, loc va, doc va

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 ((mai hoi) or (mai khoi)). hieu ve cham soc va danh vai ((cau tren) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((mai hoi) OR (mai khoi)). hieu ve cham soc va danh vai ((cau tren) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((mai hoi) or (mai khoi)). hieu ve cham soc va danh vai ((cau tren) or (dau tren))*.