Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
ve chat » va chat, van chat
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
su tien » su kien, su hien, tu tieng
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
dao vi » dao voi, dao ve, dao va
vi su » va su, ve su, ki su

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 sang ma hoi. hieu ve chat ((tuc va) or (thuc dan)) dao vi su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky sang ma hoi. hieu ve chat ((tuc va) OR (thuc dan)) dao vi su tien.
• Adding a wildcard symbol may retrieve word variants: te sach ky sang ma hoi. hieu ve chat ((tuc va) or (thuc dan)) dao vi su tien*.