Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
hoc sach » hoc sinh, hoc cac, hoc anh
ve triet » va trien, su triet
hieu ve » hieu va, hieu van
ty nang » ky nang, ty hang, ly nang
ma hoi » mai hoi, xa hoi, ma hoa
lai ve » loai ve, lai va, la ve
ve cac » va cac, vien cac
tu xa » tu va, te xa, tu ma

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 ((ty nang) OR (ty xang)) ma hoi. hieu ve cac ((tu xa) or (tu xay)) thanh lai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ty nang) OR (ty xang)) ma hoi. hieu ve cac ((tu xa) OR (tu xay)) thanh lai ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((ty nang) OR (ty xang)) ma hoi. hieu ve cac ((tu xa) or (tu xay)) thanh lai ve triet".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ty nang) OR (ty xang)) ma hoi. hieu ve cac ((tu xa) or (tu xay)) thanh lai ve triet*.