Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dau cua » dai cua, day cua, cau cua
hieu va » lieu va, hieu qua
va cham » va chat, va tham
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
ca viet » va viet, co viet, hoa viet
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
cua ca » cua cac, cua cay, cua can

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 ((ly nang) OR (ly vang)) xa hoi. hieu va cham ((luc va) or (tuc va)) dau cua ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ly nang) OR (ly vang)) xa hoi. hieu va cham ((luc va) OR (tuc va)) dau cua ca viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ly nang) OR (ly vang)) xa hoi. hieu va cham ((luc va) or (tuc va)) dau cua ca viet*".