Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cau triet » cau trieu, su triet, cua triet
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu vu » hieu va, hieu ve, hieu su
vu tham » va tham, vu kham, vu cham
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu vu tham thuc van hanh vi cau triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu vu tham thuc van hanh vi cau triet*.