Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cua triet » cua viet, su triet, va triet
viec day » viec dat, viec xay, viec hay
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
thuc va » thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo

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 xa hoi. hieu viec day ((thuc va) or (thuc vat)) hanh vi ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu viec day ((thuc va) OR (thuc vat)) hanh vi ((cuu tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu viec day ((thuc va) or (thuc vat)) hanh vi ((cuu tre) or (cua triet))*.