Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu tuc » hieu thuc, hieu luc, hieu thuoc
tuc cham » toc cham, tu cham, phuc cham
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
va viet » hoa viet, san viet, mai viet
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
dan va » doan va, dan ca, ban va
x hoi » xa hoi, o hoi, x ho
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (toc sach)) ky nang x hoi. hieu tuc cham xuc va dan va va viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (toc sach)) ky nang x hoi. hieu tuc cham xuc va dan va va viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (toc sach)) ky nang x hoi. hieu tuc cham xuc va dan va va viet*.