Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
lang van » dang van, tang van, hoang van
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
va dinh » van dinh, va kinh, vu dinh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac bo » bac bo, cac co
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: su sach ky ((nang xa) or (lang van)) hoi. hieu hien cac bo ((va dinh) or (va tinh)) vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (lang van)) hoi. hieu hien cac bo ((va dinh) OR (va tinh)) vai cua tu.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (lang van)) hoi. hieu hien cac bo ((va dinh) or (va tinh)) vai cua tu*.