Perhaps you should try some spelling variations:
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
hieu le » hieu ve, hieu he, hieu ly
cua lao » cu lao, ca lao, cua dao
va hang » van hang, va nang, va lang
doi cua » dai cua
hoi cua » hoi chuc
sac ky » cac ky, sai ky
le cua » ly cua
lao va » tao va, cao va, bao va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang xa hoi. hieu le cua lao va hang ((doi cua) OR (hoi cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. hieu le cua lao va hang ((doi cua) OR (hoi cua)) triet".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. hieu le cua lao va hang ((doi cua) OR (hoi cua)) triet*.