Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hanh lam » thanh lap, hanh kem, hanh va
cua viet » ca viet, hoa viet, cua vat
sach ty » sach y, sach tu, xach tay
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc tan, duc manh, duc phan
lam cua » nam cua, lam chat
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 ty) OR (sach thu)) nang x hoi. hieu va cham ((duc van) or (duc va)) hanh lam cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang x hoi. hieu va cham ((duc van) OR (duc va)) hanh lam cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach thu)) nang x hoi. hieu va cham ((duc van) or (duc va)) hanh lam cua viet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach thu)) nang x hoi. hieu va cham ((duc van) or (duc va)) hanh lam cua viet*.