Perhaps you should try some spelling variations:
ve triet » va trien, su triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
dinh de » dinh ve, dinh du, dinh le
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam

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 ve cam ((duc va) or (thuc va)) dinh de ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu ve cam ((duc va) OR (thuc va)) dinh de ve triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu ve cam ((duc va) or (thuc va)) dinh de ve triet*.