Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
vai cua » dai cua, hai cua, lai cua
di cua » dai cua, doi cua, de cua
su sac » su sach, su cac, su xac
va cam » va cham, va cac, va cao
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, ve cai
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: su sac ky sang ma hoi. hieu ((ve cam) OR (va cam)) thuc van hanh ((vai cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky sang ma hoi. hieu ((ve cam) OR (va cam)) thuc van hanh ((vai cua) OR (di cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky sang ma hoi. hieu ((ve cam) OR (va cam)) thuc van hanh ((vai cua) or (di cua)) tre*".