Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
vi cua » vai cua
di cua » doi cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky sang ma hoi. hieu ve cam thuc dan hanh ((vi cua) or (((di cua) OR (dai cua)))) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky sang ma hoi. hieu ve cam thuc dan hanh ((vi cua) OR (((di cua) OR (dai cua)))) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky sang ma hoi. hieu ve cam thuc dan hanh ((vi cua) or (((di cua) OR (dai cua)))) tre*".