Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh tai » thanh tai, hang tai, han tai
hanh lai » hanh lam, thanh lap, thanh loi
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
bo sach » co sach, hoc sach
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
cac tu » cac thu, cach tu, cac du
ma hoi » xa hoi, ma hoa, me hoi
ve cac » va cac, vien cac
tu xa » tu xay, tu va, te xa

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

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