Perhaps you should try some spelling variations:
kham chua » kham pha
tham thuc » nham thuc, pham thuc, tam thuc
nham thu » nham thuc, nam thu, pham thu
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
va hanh » van hanh, va thanh, va danh
vi cuu » vi luu, vinh cuu
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky tang ma hoi. hieu van ((tham thuc) or (((kham chua) or (nham thu)))) va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang ma hoi. hieu van ((tham thuc) OR (((kham chua) OR (nham thu)))) va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang ma hoi. hieu van ((tham thuc) or (((kham chua) or (nham thu)))) va hanh vi cuu tre*.