Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
thi lan » thi hanh, thi nang, thi lien
lan nam » van nam, dan nam, ban nam
hanh di » hanh vi, hanh de, hang di
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 nang xa hoi. thi lan nam thuc day hanh di ((va triet) or (va (thiet OR thieu)))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. thi lan nam thuc day hanh di ((va triet) OR (va (thiet OR thieu))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. thi lan nam thuc day hanh di ((va triet) or (va (thiet OR thieu)))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. thi lan nam thuc day hanh di ((va triet) or (va (thiet OR thieu)))*.