Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
ly nang » ky nang, ly hang, ly vang
va cham » va chat
va tham » van tham, va thanh, va thuat
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
y nang » ky nang, v nang, may nang
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) or (ly nang)) xa hoi. lieu ((va cham) OR (va tham)) luc va hanh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ly nang)) xa hoi. lieu ((va cham) OR (va tham)) luc va hanh va cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) or (ly nang)) xa hoi. lieu ((va cham) OR (va tham)) luc va hanh va cau tren*".