Perhaps you should try some spelling variations:
sieu viet » su viet, dien viet, bien viet
trinh han » trinh quan
hieu viec » nhieu viec, hieu ve, hieu hien
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, su sach, te sach
han cua » hang cua, nhan cua, than cua
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty hang, ly nang
xuc va » duc va, tuc va, luc va

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 ((ty nang) or (ty xang)) xa hoi. ((hieu viec) or (sieu viet)) cam xuc va trinh han cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) xa hoi. ((hieu viec) OR (sieu viet)) cam xuc va trinh han cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty xang)) xa hoi. ((hieu viec) or (sieu viet)) cam xuc va trinh han cua tre*.