Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
cham sac » cham soc, pham sach, cap sac
van hoi » van hoa, van hoc, van hoe
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sac van » cac van, san van, sat van
ky lang » ky dang, ky tang, tay lang
cu tren » tu tren, dua tren
la tren » loai tren, dua tren, dat tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ky lang) OR (ky nang)) van hoi. hieu ve cham sac van thanh vi ((cu tren) or (la tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky lang) OR (ky nang)) van hoi. hieu ve cham sac van thanh vi ((cu tren) OR (la tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky lang) OR (ky nang)) van hoi. hieu ve cham sac van thanh vi ((cu tren) or (la tren))*".