Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
ky dang » ky danh
vu san » va san, vu ban
ma hoi » mai hoi, xa hoi, ma hoa
va nam » van nam, ha nam, va nay
le nam » ly nam, he nam, le na
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ((ky dang) OR (ky nang)) ma hoi. hieu ((va nam) OR (le nam)) thuc dan hanh vi cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu san ((ky dang) OR (ky nang)) ma hoi. hieu ((va nam) or (le nam)) thuc dan hanh vi cua tu~".
• Adding a wildcard symbol may retrieve word variants: vu san ((ky dang) OR (ky nang)) ma hoi. hieu ((va nam) or (le nam)) thuc dan hanh vi cua tu*.