Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh de, thanh do
cau tren » cu tren, dau tren, ca tren
vu sach » vu bach, su sach, vu khach
vu khac » vu kham, vu khanh, bui khac
hieu ve » hieu va, hieu van
bao tuc » bao thuc, dao tuc, bao luc
ve bao » te bao, va bao
tuc va » thuc va, truc va, tuc xa
di cau » da cau, diem cau
x hoi » o hoi, x ho, 5 hoi

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) or (vu khac)) ky nang ((x hoi) or (xa hoi)). hieu ve bao tuc va thanh di cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khac)) ky nang ((x hoi) OR (xa hoi)). hieu ve bao tuc va thanh di cau tren.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khac)) ky nang ((x hoi) or (xa hoi)). hieu ve bao tuc va thanh di cau tren*.