Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh vai » hanh va, hanh tai, hanh van
cao tuc » dao tuc, cao duc, cao suc
co sach » bo sach, cuon sach, hoc sach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
va cao » va cac, va co, va dao
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) or (hoc sinh)) v nang ma hoi. hieu va cao tuc xa ((hanh vai) or (hanh vi)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (hoc sinh)) v nang ma hoi. hieu va cao tuc xa ((hanh vai) OR (hanh vi)) ve triet.
• Adding a wildcard symbol may retrieve word variants: ((co sach) or (hoc sinh)) v nang ma hoi. hieu va cao tuc xa ((hanh vai) or (hanh vi)) ve triet*.