Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam tuc » cam xuc, dam thuc, nam truc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
cam tu » cam thu, nam tu, dam tu

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 ty nang xa hoi. hieu ve ((((cam tuc) OR (nam thuc))) or (cam tu)) va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu ve ((((cam tuc) OR (nam thuc))) OR (cam tu)) va hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu ve ((((cam tuc) OR (nam thuc))) or (cam tu)) va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu ve ((((cam tuc) OR (nam thuc))) or (cam tu)) va hanh dai cua tre*.