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
hieu ve » hieu va, hieu van
co sach » bo sach, cuon sach, hoc sach
ty nang » ky nang, ty hang, ly nang
ma hoi » mai hoi, xa hoi, ma hoa
cac tu » cac thu, cach tu, cac du
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: co sach ((ty nang) OR (ty xang)) ma 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: co sach ((ty nang) OR (ty xang)) ma 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: "co sach ((ty nang) OR (ty xang)) ma hoi. hieu ve cac tu xa ((hanh lai) or (hanh tai)) ve triet".
• Adding a wildcard symbol may retrieve word variants: co sach ((ty nang) OR (ty xang)) ma hoi. hieu ve cac tu xa ((hanh lai) or (hanh tai)) ve triet*.