Perhaps you should try some spelling variations:
dang loai » dan loai, dang hoai, dang loi
van hanh » van thanh, van anh, van ban
mang lai » mang lam, mang luoi, trang lai
ban hanh » ban hang
tham soc » cham soc, tham nuoc, thai son
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu

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 ((mang lai) or (dang loai)) hoa. hieu va tham soc ((van hanh) OR (ban hanh)) dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((mang lai) OR (dang loai)) hoa. hieu va tham soc ((van hanh) OR (ban hanh)) dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((mang lai) or (dang loai)) hoa. hieu va tham soc ((van hanh) OR (ban hanh)) dai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((mang lai) or (dang loai)) hoa. hieu va tham soc ((van hanh) OR (ban hanh)) dai cua te*.