Perhaps you should try some spelling variations:
hieu hieu » hien hieu, hieu hien, thien hieu
hieu cac » hieu luc, hieu va, hieu van
vu sach » vu bach, su sach, vu khach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
cac ly » cac ky, cac le, cam ly
va dan » ca dan, va dao, va dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (te sach)) ky nang xa hoi. hieu hieu cac ly va dan ((vai cua) OR (hai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (te sach)) ky nang xa hoi. hieu hieu cac ly va dan ((vai cua) OR (hai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (te sach)) ky nang xa hoi. hieu hieu cac ly va dan ((vai cua) OR (hai cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (te sach)) ky nang xa hoi. hieu hieu cac ly va dan ((vai cua) OR (hai cua)) te*.