Perhaps you should try some spelling variations:
dien viet » tieng viet, trien viet, gian viet
hieu viec » nhieu viec, hieu ve, sieu viet
trinh van » trinh han, trinh quan, trinh toan
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, su sach, te 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
cam tuc » cam xuc, cam tu, nam thuc
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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