Perhaps you should try some spelling variations:
nang hanh » nang thanh, dang hanh, nang hang
va trien » va truyen, va thiet, va tuyen
duc nang » dun nang, cuc nang, duc bang
va triet » va thiet, ve triet, cua triet
hanh dai » hanh tai, hanh dao, vanh dai
cham duc » pham duc, cham soc, pham duy
sach thu » sach thue, sach thieu, sach tham
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
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: tu ((sach y) or (sach thu)) nang x hoi. hieu ve cham duc nang hanh dai ((va triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach thu)) nang x hoi. hieu ve cham duc nang hanh dai ((va triet) OR (va trien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach y) or (sach thu)) nang x hoi. hieu ve cham duc nang hanh dai ((va triet) OR (va trien))*".