Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
hanh doi » thanh doi, hanh noi, hang doi
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
doi cua » dai cua, hoi cua, dong cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 y nang ma hoa. hieu ((vien cac) or (va cac)) nuoc va hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoa. hieu ((vien cac) OR (va cac)) nuoc va hanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoa. hieu ((vien cac) or (va cac)) nuoc va hanh doi cua tre*.