Perhaps you should try some spelling variations:
te sach » toc sach
va hanh » van hanh, va thanh, va danh
de cua » le cua, te cua, dieu cua
di cua » dai cua, doi cua, do cua
luc va » duc va, tuc va, loc va
ke cau » ket cau
y nang » ky nang, ly nang, v nang
ve cau » va cau, ve cac, le cau
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((ve cau) or (ke cau)) luc va hanh ((di cua) OR (de cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu ((ve cau) OR (ke cau)) luc va hanh ((di cua) OR (de cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. hieu ((ve cau) or (ke cau)) luc va hanh ((di cua) OR (de cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu ((ve cau) or (ke cau)) luc va hanh ((di cua) OR (de cua)) te*.