Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sang ma » tang ma, nang ma, sang tao
ve cham » va cham, ve chat, vu cham
vu kham » vu khanh
duc van » duc va, duc tan, duc manh
hanh va » hang va, hanh vi
ma hoi » mai hoi, xa hoi, ma hoa
va cua » va chua, via cua, ca cua
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: tu sach _ sang ma hoi. hieu ((ve cham) or (vu kham)) duc van hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach _ sang ma hoi. hieu ((ve cham) OR (vu kham)) duc van hanh va cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach _ sang ma hoi. hieu ((ve cham) or (vu kham)) duc van hanh va cua te*.