Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh dai » hanh tai, hanh dao, vanh dai
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang
tuc va » truc va, tuc xa, duc va
ma hoi » mai hoi, xa hoi, me hoi
dai ve » dap ve, dau ve, dai 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 sach y nang ((ma hoi) or (ma hoa)). hieu ve cam ((tuc va) or (thuc va)) hanh dai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((ma hoi) OR (ma hoa)). hieu ve cam ((tuc va) OR (thuc va)) hanh dai ve triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((ma hoi) or (ma hoa)). hieu ve cam ((tuc va) or (thuc va)) hanh dai ve triet*.