Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue nang » thien nang, thuat nang, thi nang
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu vi » hieu voi, hieu va, hieu ve
duc van » duc va, duc tan, duc manh
bai cua » ban cua, dai cua, bai ca
lai cua » dai cua, hai cua, lai chau
pham » phan

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 thue nang xa hoi. hieu vi pham duc van hanh ((bai cua) or (lai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thue nang xa hoi. hieu vi pham duc van hanh ((bai cua) OR (lai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach thue nang xa hoi. hieu vi pham duc van hanh ((bai cua) or (lai cua)) triet*.