Perhaps you should try some spelling variations:
kham chua » kham pha
hanh vai » hanh vi, hanh tai, hanh van
so sach » so sanh, bo sach, co sach
hanh va » hang va, hanh vi
chua va » chuc va, chua may, chuan ha
ve kham » vu kham, va kham, ve cham
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
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: so sach thieu ((nang ma) or (tang ma)) hoi. hieu ve kham chua va ((hanh vai) or (hanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thieu ((nang ma) OR (tang ma)) hoi. hieu ve kham chua va ((hanh vai) OR (hanh va)) cua te.
• Adding a wildcard symbol may retrieve word variants: so sach thieu ((nang ma) or (tang ma)) hoi. hieu ve kham chua va ((hanh vai) or (hanh va)) cua te*.