Perhaps you should try some spelling variations:
cap nuoc » dat nuoc
hang vai » hang hai, hang vi, hang vat
hang tai » dung tai
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cap » ve cac, le cap, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu ve cap nuoc va ((((hang vai) OR (hang tai))) or (hang va)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ve cap nuoc va ((((hang vai) OR (hang tai))) OR (hang va)) va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ve cap nuoc va ((((hang vai) OR (hang tai))) or (hang va)) va triet*".