Perhaps you should try some spelling variations:
nhan viet » nhan vien, han viet, nhin viet
trinh van » trinh han, trinh quan, trinh toan
sieu viet » su viet, dien viet, bien viet
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
y nang » ky nang, ly nang, may nang
xuc va » duc va, tuc va, luc va
v nang » va nang, vu nang, van nang

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) OR (v nang)) xa hoi. ((sieu viet) 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) OR (v nang)) xa hoi. ((sieu viet) 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) OR (v nang)) xa hoi. ((sieu viet) or (nhan viet)) cac xuc va trinh van cua tre*".