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