Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va danh, ban hanh
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
cua tu » cua tuc, cua su, cua cu

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 xa) or (hang va)) hoi. hieu ve cac luc ((va hanh) or (va thanh)) hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (hang va)) hoi. hieu ve cac luc ((va hanh) OR (va thanh)) hai cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (hang va)) hoi. hieu ve cac luc ((va hanh) or (va thanh)) hai cua tu*.