Perhaps you should try some spelling variations:
truoc xay » thuc xay, truoc dam, truoc nam
hieu van » hieu va, thien van, lieu va
van chat » cao chat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
truc xa » tuc xa, truc va, truc may
vi cua » vai cua
di cua » dai cua, doi cua, de 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 ky nang xa hoi. hieu van chat ((truc xa) OR (truoc xay)) hanh ((vi cua) or (di cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu van chat ((truc xa) OR (truoc xay)) hanh ((vi cua) OR (di cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu van chat ((truc xa) OR (truoc xay)) hanh ((vi cua) or (di cua)) tu".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu van chat ((truc xa) OR (truoc xay)) hanh ((vi cua) or (di cua)) tu*.