Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
hieu van » hieu va, thien van, lieu va
phan xay » phan dau, phan lap, van xay
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu nang xa hoi. hieu van ((pham chuc) or (phan xay)) va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu nang xa hoi. hieu van ((pham chuc) OR (phan xay)) va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: so sach thu nang xa hoi. hieu van ((pham chuc) or (phan xay)) va hanh vi cua te*.