Perhaps you should try some spelling variations:
van tran » van trang, van tranh, van tuan
vu sach » vu bach, su sach, vu khach
duc van » duc va, duc tan, duc manh
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cau duc » cao duc, cau luc, chu duc
cuc tu » luc tu, duc tu, cac tu
va cau » van cau, va cac, va dau
cuc du » cac du

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 y ((nang xa) or (lang xa)) hoi. hieu va cau duc van tran thi ((cuc tu) or (cuc du))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((nang xa) OR (lang xa)) hoi. hieu va cau duc van tran thi ((cuc tu) OR (cuc du)).
• Adding a wildcard symbol may retrieve word variants: vu sach y ((nang xa) or (lang xa)) hoi. hieu va cau duc van tran thi ((cuc tu) or (cuc du))*.