Perhaps you should try some spelling variations:
dau truc » cau truc, dai truc, doan truc
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hanh di » hanh vi, hanh de, hang di
cua tre » cuu tre, cua triet, dua tren
ma hoi » mai hoi, xa hoi, me hoi
va dau » va dao
cua te » cua tu

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 ky nang ((ma hoi) OR (ma hoa)). lieu va dau truc van hanh di ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((ma hoi) OR (ma hoa)). lieu va dau truc van hanh di ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) OR (ma hoa)). lieu va dau truc van hanh di ((cua tre) or (cua te))*".