Perhaps you should try some spelling variations:
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua
cua cu » cua chu, cua cau, cua su

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