Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
cuu tre » cua tre, cau tren, cau treo
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
ma hoi » mai hoi, xa hoi, ma hoa
tu can » tu ban, tu cac, thu canh
dan vi » doan vi, don vi, dan va
vi cuu » vi luu, vinh cuu
tu san » thu san, tu ban, vu 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 san) OR (tu can)) ky dang ma hoi. hieu ve cham ((thuc dan) or (tuc xa)) dan vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu can)) ky dang ma hoi. hieu ve cham ((thuc dan) OR (tuc xa)) dan vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) OR (tu can)) ky dang ma hoi. hieu ve cham ((thuc dan) or (tuc xa)) dan vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu san) OR (tu can)) ky dang ma hoi. hieu ve cham ((thuc dan) or (tuc xa)) dan vi cuu tre*.