Perhaps you should try some spelling variations:
cau trieu » cac trieu, cau triet, chua trieu
cay phoi » cap phoi, tay hoi, cay cho
tan hanh » tan thanh, tang hanh, toan hanh
hieu van » hieu va, thien van, lieu va
hanh va » hang va, hanh vi
lam duc » lam duoc, pham duc, nam duoc
van lam » van nam
tu sach » thu sach, te sach, tu cach
xay hoi » xa hoi, tay hoi, gay thoi
ky dang » ky nang, ky danh
su sach » so sach, vu sach
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ky dang ((xay hoi) or (cay phoi)). hieu van lam duc tan hanh va cau trieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky dang ((xay hoi) OR (cay phoi)). hieu van lam duc tan hanh va cau trieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky dang ((xay hoi) or (cay phoi)). hieu van lam duc tan hanh va cau trieu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky dang ((xay hoi) or (cay phoi)). hieu van lam duc tan hanh va cau trieu*.