Perhaps you should try some spelling variations:
thanh nghia » thanh nghi, thanh nga, thanh nha
nghia cua » nghiep cua, nghia xa, nghia duy
cam thuc » am thuc, cam thu, can thuc
nam thuc » nam thuoc, am thuc, nam tu
da thanh » dao thanh, dat thanh, dam thanh
su sach » so sach, vu 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
cua tre » cua te, cuu tre, cua triet

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 ty nang xa hoi. hieu ve ((cam thuc) or (((nam thuc) OR (nam thu)))) da thanh nghia cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ve ((cam thuc) OR (((nam thuc) OR (nam thu)))) da thanh nghia cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ve ((cam thuc) or (((nam thuc) OR (nam thu)))) da thanh nghia cua tre*".