Perhaps you should try some spelling variations:
ve triet » va trien, su triet
tang mai » tang ma, tang tai, sang mai
nam thuc » nam thuoc, am thuc, nam thu
lang mai » lang dai, lang hai, lang man
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
toc sac » toc sach, toc san, hoc sach
hieu va » lieu va, hieu qua
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
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: toc sac ky ((tang mai) OR (lang mai)) hoi. hieu va nam thuc va hanh vi ((cua te) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky ((tang mai) OR (lang mai)) hoi. hieu va nam thuc va hanh vi ((cua te) OR (ve triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky ((tang mai) OR (lang mai)) hoi. hieu va nam thuc va hanh vi ((cua te) or (ve triet))*".