Perhaps you should try some spelling variations:
ve triet » va trien
cam thuc » am thuc, nam thuc, cam thu
su triet » su viet, su tien
thanh ha » thanh hoa, thanh hai, nhanh ha
da thanh » dao thanh, dat thanh, dam thanh
hieu ve » hieu va, hieu van
thuc da » thuc dan, thuc day, thuc dia
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
ve cam » ve cham, ve cac, va cam

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