Perhaps you should try some spelling variations:
nhan viet » nhan vien, han viet, nhin viet
hieu viec » nhieu viec, sieu viet, hieu hien
trinh van » trinh han, trinh quan, trinh toan
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, su sach, te sach
van cua » vang cua, ban cua, dan cua
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v 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 y nang cao hoc. ((((hieu viec) OR (hieu ve))) or (nhan viet)) cac xuc va trinh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang cao hoc. ((((hieu viec) OR (hieu ve))) OR (nhan viet)) cac xuc va trinh van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang cao hoc. ((((hieu viec) OR (hieu ve))) or (nhan viet)) cac xuc va trinh van cua tre*".