Perhaps you should try some spelling variations:
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
hai cua » thai cua, hoi cua, lai cua
ve cac » va cac, vien cac
toc xa » toc ta, hoc xa, tac xa

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 ty nang xa hoi. hieu ve cac ((toc xa) or (tuc xa)) danh ((hai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu ve cac ((toc xa) OR (tuc xa)) danh ((hai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu ve cac ((toc xa) or (tuc xa)) danh ((hai cua) or (dai cua)) tre*.