Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
sach ky » sac ky, sach y, sach ty
nang ha » nang hai, nang han, nang hoa
qua cam » qua cham, qua cac, qua ca
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, dua tren
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang ha hoi. hieu qua cam xuc ((va hanh) or (va danh)) vai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ha hoi. hieu qua cam xuc ((va hanh) OR (va danh)) vai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ha hoi. hieu qua cam xuc ((va hanh) or (va danh)) vai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ha hoi. hieu qua cam xuc ((va hanh) or (va danh)) vai ((cua tre) OR (cua triet))*.