Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
dua tren » dung tren
cham tuc » nham thuc, pham thuc, tham thuc
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
tu sach » su sach, te sach, tu cach
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ty nang xa hoi. hieu ve cham tuc va hanh vi ((dua tren) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ty nang xa hoi. hieu ve cham tuc va hanh vi ((dua tren) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ty nang xa hoi. hieu ve cham tuc va hanh vi ((dua tren) or (cuu tre))*.