Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dau tren » dau tien, dat tren, dau tieng
mai hoi » mai khoi, dai hoi, lai hoi
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cu tren » tu tren, dua tren
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
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 ((ma hoi) or (mai hoi)). lieu va cham soc va hanh va ((cu tren) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((ma hoi) OR (mai hoi)). lieu va cham soc va hanh va ((cu tren) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((ma hoi) or (mai hoi)). lieu va cham soc va hanh va ((cu tren) or (dau tren))*.