Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, te 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
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, ban hanh
hanh va » hang va, hanh vi
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang xa hoi. hieu ve cau thuc va hanh va cau treo~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ve cau thuc va hanh va cau treo*.