Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh nam » thanh nam, hanh lam, hanh ngay
thuc van » thuc vat, thuc dan, thuc va
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
tuc va » thuc va, truc va, tuc xa
nam ve » nam va, nam he, nam v
ve cam » ve cham, ve cac, va cam

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 ((thi hanh) or (thi thanh)) xa hoi. hieu ve cam ((thuc van) or (tuc va)) hanh nam ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thi hanh) OR (thi thanh)) xa hoi. hieu ve cam ((thuc van) OR (tuc va)) hanh nam ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((thi hanh) or (thi thanh)) xa hoi. hieu ve cam ((thuc van) or (tuc va)) hanh nam ve triet*.