Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cau tren » dau tren, ca tren, cau treo
vu khach » vu khanh, vu khac, vay khach
thanh da » thanh dat, thanh dam, thanh dan
su sach » so sach, vu sach
cu tren » tu tren, dua tren
hieu ve » hieu va, hieu van
su van » tu van, vu van
ve cao » va cao, ve bao, ve cac
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) ky nang x hoi. hieu ve cao su van thanh da ((cau tren) OR (cu tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu khach)) ky nang x hoi. hieu ve cao su van thanh da ((cau tren) OR (cu tren))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) ky nang x hoi. hieu ve cao su van thanh da ((cau tren) OR (cu tren))*.