Perhaps you should try some spelling variations:
doi cua » dai cua, hoi cua
so cham » so kham, co cham, so chat
thuc va » thuc vat, thuc dan, thuc day
hieu so » thieu so
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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 sang ma hoi. hieu so cham ((thuc va) or (tuc xa)) dan ((vi cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ma hoi. hieu so cham ((thuc va) OR (tuc xa)) dan ((vi cua) OR (doi cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ma hoi. hieu so cham ((thuc va) or (tuc xa)) dan ((vi cua) or (doi cua)) tre*.