Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
ban thanh » ban hanh, ban hang
vu thanh » su thanh, vu khanh, cuu thanh
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cao dua » cao duc, ca dua, cay dua
dua ban » dia ban, cua ban, qua ban
ve cao » va cao, ve bao, ve cac
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: ((su sach) or (vu thanh)) ky nang ((x hoi) or (xa hoi)). hieu ve cao dua ban thanh dat cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu thanh)) ky nang ((x hoi) OR (xa hoi)). hieu ve cao dua ban thanh dat cau tren.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu thanh)) ky nang ((x hoi) or (xa hoi)). hieu ve cao dua ban thanh dat cau tren*.