Perhaps you should try some spelling variations:
pham viet » phap viet
nam viet » lam viec, bac viet, nam hien
phan lap » phan dau
van phan » van phong, van thanh, luan phan
cham duc » pham duc, cham soc, pham duy
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ty » sach tu, sach thu, xach tay
duc van » duc va, duc tan, duc manh
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ty) OR (sach y)) nang x hoi. hieu va cham duc van phan lap ((nam viet) or (pham viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach y)) nang x hoi. hieu va cham duc van phan lap ((nam viet) OR (pham viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) OR (sach y)) nang x hoi. hieu va cham duc van phan lap ((nam viet) or (pham viet))".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) OR (sach y)) nang x hoi. hieu va cham duc van phan lap ((nam viet) or (pham viet))*.