Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
xa thanh » va thanh, ha thanh, ta thanh
vai cua » dai cua, hai cua, lai cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
va cam » va cham, va cao, va cai
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang ((o hoi) OR (o hai)). lieu ((va cam) or (va cac)) tuc xa thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang ((o hoi) OR (o hai)). lieu ((va cam) OR (va cac)) tuc xa thanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang ((o hoi) OR (o hai)). lieu ((va cam) or (va cac)) tuc xa thanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ((o hoi) OR (o hai)). lieu ((va cam) or (va cac)) tuc xa thanh vai cua triet*.