Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
cap nuoc » dat nuoc
hang vai » hang tai, hang hai, hang vi
hieu van » hieu va, thien van, lieu va
hieu ve » hieu va
sach ly » sach y, sach lo, sach ty
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
su sach » so sach, vu sach

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