Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve luat » va luat, ve thuat
thuc va » thuc vat, thuc dan, thuc day
su tien » su kien, su hien, tu tieng
tuc va » truc va, tuc xa, duc va
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 nang xa hoi. hieu ve luat ((tuc va) OR (thuc va)) dao ve su tien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ve luat ((tuc va) OR (thuc va)) dao ve su tien".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ve luat ((tuc va) OR (thuc va)) dao ve su tien*.