Perhaps you should try some spelling variations:
sach truc » cach thuc, sach tren, sach thu
bach thu » bach nhu, sach thu, bich thuy
hanh tri » thanh tri, hanh tai, hanh trinh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
ve cac » va cac, vien cac
cua su » qua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach truc) or (bach thu)) nang xa hoi. hieu ve cac duc va hanh tri cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach truc) OR (bach thu)) nang xa hoi. hieu ve cac duc va hanh tri cua su.
• Adding a wildcard symbol may retrieve word variants: vu ((sach truc) or (bach thu)) nang xa hoi. hieu ve cac duc va hanh tri cua su*.