Perhaps you should try some spelling variations:
phong lap » phong la, phong lam, thong lap
van phong » van dong, hai phong
pham viet » phap viet
thu sach » tu sach, thuat sach, thuoc sach
cham duc » pham duc, cham soc, pham duy
nam viet » lam viec, bac viet, nam hien
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
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 nang x hoi. hieu va cham duc van phong lap ((nam viet) or (pham viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang x hoi. hieu va cham duc van phong lap ((nam viet) OR (pham viet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang x hoi. hieu va cham duc van phong lap ((nam viet) or (pham viet))*.