Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
doanh van » doan van, doanh va, doanh ban
danh bat » doanh bat, anh bai, dinh ba
vien cac » vien bach, vien dai, vien da
danh vai » danh sai, danh va, dang van
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cac lo » cac lop, cac co, cac bo
ma hoi » mai hoi, xa hoi, ma hoa
lo van » le van, vo van, so van

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 ma hoi. hieu vien cac lo van ((((danh vai) or (doanh van))) or (danh bat)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. hieu vien cac lo van ((((danh vai) OR (doanh van))) OR (danh bat)) cuu tre*.