Perhaps you should try some spelling variations:
hanh vai » hanh va, hanh tai, hanh van
su sach » so sach, vu sach
cao tuc » dao tuc, cao duc, cao suc
nang ro » nang co, nang ho, nang rong
nang ra » nang ma, lang ra, nang va
hieu va » lieu va, hieu qua
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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 ro) or (nang ra)) hoi. hieu va cao tuc va ((hanh vai) OR (hanh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang ro) OR (nang ra)) hoi. hieu va cao tuc va ((hanh vai) OR (hanh vi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang ro) or (nang ra)) hoi. hieu va cao tuc va ((hanh vai) OR (hanh vi)) cua te".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang ro) or (nang ra)) hoi. hieu va cao tuc va ((hanh vai) OR (hanh vi)) cua te*.