Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc van » thuc dan, thuc va, thuc hanh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
vu cham » va cham, vu kham, tu cham
dinh di » dinh du, dinh vi, danh di
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoi. hieu ((va cac) or (vu cham)) ((thuc van) OR (thuc vat)) dinh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu ((va cac) OR (vu cham)) ((thuc van) OR (thuc vat)) dinh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu ((va cac) or (vu cham)) ((thuc van) OR (thuc vat)) dinh di cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu ((va cac) or (vu cham)) ((thuc van) OR (thuc vat)) dinh di cua triet*.