Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
danh dap » danh dau, danh phap, doanh dao
sach ky » sac ky, sach y, sach kem
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
va chat » van chat, va phat, cao chat
soc va » loc va, doc va, goc va
dap su » dan su, da su, dap so

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach ty)) nang xa hoi. hieu va chat ((soc va) or (hoc va)) danh dap su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu va chat ((soc va) OR (hoc va)) danh dap su triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang xa hoi. hieu va chat ((soc va) or (hoc va)) danh dap su triet*.