Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
ban doan » ban doanh, ban dan, ban soan
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cua triet, dua tren
doan vi » doan va, don vi, doan thi
cuu ban » cuu van, cua ban, cuu san
cuu tre » cau tren, cau treo
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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 ky lang van hoi. hieu ((ve cam) or (ve cac)) cuu ban doan vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang van hoi. hieu ((ve cam) OR (ve cac)) cuu ban doan vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang van hoi. hieu ((ve cam) or (ve cac)) cuu ban doan vi ((cua tre) or (cuu tre))*.