Perhaps you should try some spelling variations:
cau trieu » cac trieu, cau triet, chua trieu
gay thoi » may thoi, tay thoi, ngay tuoi
cay phoi » cap phoi, tay hoi, cay cho
hieu van » hieu va, thien van, lieu va
tan hanh » tan thanh, tang hanh, toan hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
van lam » van nam
lam duc » lam duoc, pham duc, nam duoc
hanh va » hang va, hanh vi
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 ky dang ((gay thoi) 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 ky dang ((gay thoi) OR (cay phoi)). hieu van lam duc tan hanh va cau trieu.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang ((gay thoi) or (cay phoi)). hieu van lam duc tan hanh va cau trieu*.