Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh via » thanh va, thanh vien, thanh vinh
viec cac » vien cac, viec lam, viec va
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky lang xa hoi. hieu ((viec cac) or (viec cua)) luc va ((thanh via) or (thanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. hieu ((viec cac) OR (viec cua)) luc va ((thanh via) OR (thanh van)) cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu ((viec cac) or (viec cua)) luc va ((thanh via) or (thanh van)) cua tre*.