Perhaps you should try some spelling variations:
cao nang » cam nang, cao tang, cao bang
dau truc » cau truc, dai truc, doan truc
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
kem cua » em cua, keo cua, diem cua
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((v nang) or (((cao nang) OR (cao dang)))) xa hoi. lieu va dau truc van hanh kem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (((cao nang) OR (cao dang)))) xa hoi. lieu va dau truc van hanh kem cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v nang) or (((cao nang) OR (cao dang)))) xa hoi. lieu va dau truc van hanh kem cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (((cao nang) OR (cao dang)))) xa hoi. lieu va dau truc van hanh kem cua tre*.