Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
xuc van » duc van, luc van, xuc ban
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty hang, ly nang
va cam » va cham, va cac, va cao

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

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