Perhaps you should try some spelling variations:
te sach » toc sach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cua cau » cua cac, cua chu, cua cay
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua
ve cau » ke cau, ve cac, le cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((sang ma) or (nang ma)) hoi. hieu ((ve cau) or (va cau)) luc va hanh va cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((sang ma) OR (nang ma)) hoi. hieu ((ve cau) OR (va cau)) luc va hanh va cua cau.
• Adding a wildcard symbol may retrieve word variants: te sach y ((sang ma) or (nang ma)) hoi. hieu ((ve cau) or (va cau)) luc va hanh va cua cau*.