Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh lai » hanh lam, hanh tai, thanh lap
cham xu » chao xu, cham cuu, chat xuc
cach tu » cach thuc
va hanh » van hanh, va thanh, va danh
tu nang » tru nang, tu nong, tu nano
su cach » su sach, tu cach, su cac
o hoi » co hoi, o hai, o hoa
o hoc » co hoc, mo hoc, so hoc
xu va » xu van, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cach tu nang ((o hoi) or (o hoc)). ((lieu va) or (hieu qua)) cham xu va hanh lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach tu nang ((o hoi) OR (o hoc)). ((lieu va) OR (hieu qua)) cham xu va hanh lai su triet.
• Adding a wildcard symbol may retrieve word variants: su cach tu nang ((o hoi) or (o hoc)). ((lieu va) or (hieu qua)) cham xu va hanh lai su triet*.