Perhaps you should try some spelling variations:
pham tai » pham thi, pham van
van pham » san pham, van phan, van phat
su sach » so sach
duc van » duc va, duc tan, duc manh
cau duc » cao duc, cau luc, chu duc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
vu sach » vu bach, vu khach
va cau » van cau, va cac, va dau
cuc tu » cuc du, luc tu, duc tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky ((nang xa) OR (lang xa)) hoi. hieu va cau duc van pham tai cuc tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky ((nang xa) or (lang xa)) hoi. hieu va cau duc van pham tai cuc tu~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky ((nang xa) or (lang xa)) hoi. hieu va cau duc van pham tai cuc tu*.