Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
nang ma » tang ma, sang ma, nang cao
sac ky » sai ky
ma hoi » mai hoi, xa hoi, ma hoa
ve nam » he nam, va nam, te nam
le nam » ly nam, he nam, le na
vi cua » vai cua, di cua
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: vu ((sac ky) OR (cac ky)) nang ma hoi. hieu ((ve nam) or (le nam)) thuc dan hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sac ky) OR (cac ky)) nang ma hoi. hieu ((ve nam) OR (le nam)) thuc dan hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sac ky) OR (cac ky)) nang ma hoi. hieu ((ve nam) or (le nam)) thuc dan hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu ((sac ky) OR (cac ky)) nang ma hoi. hieu ((ve nam) or (le nam)) thuc dan hanh vi cua te*.