Perhaps you should try some spelling variations:
phan tien » phan kien, phan bien, phap tieng
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
va phan » van phan, va phat, va phap
cua tuc » cua duc, cua thuoc, luat tuc
cao suc » cao su, cao duc
hieu ve » hieu va, hieu van
ve cao » va cao, ve bao, ve cac
nang o » nang co, nang ho, nang ro
cua tu » cua su, cua cu, cua vu
suc va » duc va, tuc va, luc va
o hoi » co hoi, o hoc, o hai

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 ky nang o hoi. hieu ve cao suc va phan tien ((cua te) or (((cua tu) OR (cua tuc))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang o hoi. hieu ve cao suc va phan tien ((cua te) OR (((cua tu) OR (cua tuc)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang o hoi. hieu ve cao suc va phan tien ((cua te) or (((cua tu) OR (cua tuc))))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang o hoi. hieu ve cao suc va phan tien ((cua te) or (((cua tu) OR (cua tuc))))*.