Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tham tuc » tham thuc, thai tuc, nham thuc
cau tren » cu tren, dau tren, cau treo
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
ca tren » cu tren, la tren, co tren
y nang » ly nang, v nang, may nang
tuc va » thuc va, truc va, tuc xa

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 tham tuc va hanh vi ((cau tren) OR (ca 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 tham tuc va hanh vi ((cau tren) OR (ca 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 tham tuc va hanh vi ((cau tren) OR (ca tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (ky nang)) xa hoi. lieu va tham tuc va hanh vi ((cau tren) OR (ca tren))*.