Perhaps you should try some spelling variations:
te sach » toc sach
hieu ke » hieu kem, chieu ke, hieu ky
cau loc » hau loc, cau hoc, cau luc
va danh » va dinh, va dan, va hanh
y nang » ly nang, v nang, may nang
ro hoi » co hoi, o hoi, mo hoi
ke cau » ket cau
loc va » hoc va, luc va
di cua » doi cua, de cua, do cua

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) or (ky nang)) ro hoi. hieu ke cau loc va danh ((di cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ky nang)) ro hoi. hieu ke cau loc va danh ((di cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ky nang)) ro hoi. hieu ke cau loc va danh ((di cua) or (dai cua)) tre*.