Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
van hang » van khang, van hoang, van thang
hang vai » hang va, hang tai, hang hai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu vien cac duc van hang vai ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu vien cac duc van hang vai ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu vien cac duc van hang vai ((cuu tre) or (cua te))*.