Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
trinh viet » ninh viet, trinh vat
thu sach » thuat sach, thuoc sach, thu hoach
viec coc » viec doc, viec cong, viec cuoi
va trinh » van trinh, va tinh, lap trinh
viet cua » viec cua, viet ca, viet qua
tu sach » te sach, tu cach, vu sach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc 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) OR (thu sach))) or (su sach)) ky nang xa hoi. nhieu viec coc luc va trinh viet cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thu sach))) OR (su sach)) ky nang xa hoi. nhieu viec coc luc va trinh viet cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (thu sach))) or (su sach)) ky nang xa hoi. nhieu viec coc luc va trinh viet cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (thu sach))) or (su sach)) ky nang xa hoi. nhieu viec coc luc va trinh viet cua tre*.