Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
nang co » nang cao, nang doc, nang noi
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
soc va » hoc va, loc va, doc va
vi cau » va cau, ve cau, di cau

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 co)) hoi. lieu va cham soc va hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang x) OR (nang co)) hoi. lieu va cham soc va hanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang x) or (nang co)) hoi. lieu va cham soc va hanh vi cau tren*.