Perhaps you should try some spelling variations:
lieu van » lieu va, hieu van, sieu van
va thanh » gia thanh, ban thanh, va tinh
thanh do » thanh de, thanh pho, thanh hoa
sach ky » sach y, sach ty, sach kem
nang xa » lang xa, nang ma, mang xa
nam tuc » nam thuc, nam truc, nam tu
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
do va » do van, so va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach ky) OR (sac ky)) ((nang xa) or (nang x)) hoi. lieu van nam tuc va thanh do va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sac ky)) ((nang xa) OR (nang x)) hoi. lieu van nam tuc va thanh do va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach ky) OR (sac ky)) ((nang xa) or (nang x)) hoi. lieu van nam tuc va thanh do va thiet".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) OR (sac ky)) ((nang xa) or (nang x)) hoi. lieu van nam tuc va thanh do va thiet*.