Perhaps you should try some spelling variations:
chang tren » hang tren, thong tren, chang ran
lai chang » lai chau, lai thanh, dai thang
hanh lai » hanh lam, hanh tai, thanh lap
va hanh » van hanh, va thanh, va danh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
tu cach » tu cac
xay hoi » tay hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh
tu sach » thu sach, su sach, te sach
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (tu sach)) ky dang ((xay hoi) or (xa hoi)). hieu ve cac duc va hanh lai chang tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (tu sach)) ky dang ((xay hoi) OR (xa hoi)). hieu ve cac duc va hanh lai chang tren.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (tu sach)) ky dang ((xay hoi) or (xa hoi)). hieu ve cac duc va hanh lai chang tren*.