Perhaps you should try some spelling variations:
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
su tien » su kien, su hien, tu tieng
ve luat » va luat, ve thuat
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
tuc va » truc va, duc va, thuc vat
dao ve » bao ve, dap ve, dau ve
ve su » va 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 lang xa hoi. hieu ve luat ((((tuc va) OR (tuc xa))) or (thuc va)) dao ve su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ve luat ((((tuc va) OR (tuc xa))) OR (thuc va)) dao ve su tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ve luat ((((tuc va) OR (tuc xa))) or (thuc va)) dao ve su tien".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu ve luat ((((tuc va) OR (tuc xa))) or (thuc va)) dao ve su tien*.