Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hoan » van hoang, van hoa, van toan
hoan di » hoan doi, khoan di, hoang dai
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, ve cai
di su » doi su, ki su, da su

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 y nang ((ma hoi) or (xa hoi)). hieu ((ve cam) or (va cam)) xuc van hoan di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((ma hoi) OR (xa hoi)). hieu ((ve cam) OR (va cam)) xuc van hoan di su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((ma hoi) or (xa hoi)). hieu ((ve cam) or (va cam)) xuc van hoan di su triet*.