Perhaps you should try some spelling variations:
thanh hoa » thanh pho
hoc sach » hoc sinh, hoc anh
thanh do » thanh de, thanh pho, thanh loi
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
nam tuc » nam thuc, nam truc, nam tu
va nam » van nam, ha nam, va nay
tuc va » thuc va, truc va, tuc xa
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) or (hoc cac)) ky nang xa hoi. lieu va nam tuc va ((thanh do) OR (thanh hoa)) va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) ky nang xa hoi. lieu va nam tuc va ((thanh do) OR (thanh hoa)) va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (hoc cac)) ky nang xa hoi. lieu va nam tuc va ((thanh do) OR (thanh hoa)) va thiet".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (hoc cac)) ky nang xa hoi. lieu va nam tuc va ((thanh do) OR (thanh hoa)) va thiet*.