Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
pham duy » pham duc
cham duc » pham duc, cham soc, phan duc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
cu lang » cua lang, tu lang, chi lang
xu lang » tu lang, xu dang, xu quang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((xu lang) or (cu lang)) xa hoi. hieu ve ((cham duc) or (pham duy)) van hanh lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((xu lang) OR (cu lang)) xa hoi. hieu ve ((cham duc) OR (pham duy)) van hanh lai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((xu lang) or (cu lang)) xa hoi. hieu ve ((cham duc) or (pham duy)) van hanh lai su triet*.