Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham luc » cham soc, nhan luc, cham cuu
cau tren » cu tren, dau tren, ca tren
nang xa » lang xa, mang xa, ang xa
nang ma » tang ma, sang ma, nang cao
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
luc va » duc va, tuc va, loc va
va cau » van cau, va cac, va dau

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 xa) OR (nang x))) or (nang ma)) hoi. lieu va cham luc va hanh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((((nang xa) OR (nang x))) OR (nang ma)) hoi. lieu va cham luc va hanh va cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((((nang xa) OR (nang x))) or (nang ma)) hoi. lieu va cham luc va hanh va cau tren*".