Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach thu » sach thue, sach tham, cach thuc
va thanh » gia thanh, ban thanh, va tinh
vien da » vien dai, hien dai
san cua » sang cua, ban cua, dan cua
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cao
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: te ((sach thu) OR (sach thieu)) nang o hoi. hieu ((vien da) or (va cam)) duc va thanh san cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thu) OR (sach thieu)) nang o hoi. hieu ((vien da) OR (va cam)) duc va thanh san cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thu) OR (sach thieu)) nang o hoi. hieu ((vien da) or (va cam)) duc va thanh san cua triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) OR (sach thieu)) nang o hoi. hieu ((vien da) or (va cam)) duc va thanh san cua triet*.