Perhaps you should try some spelling variations:
thanh tri » thanh tra, thanh tai, chinh tri
chat duc » chat xuc, chat doc, chet duoc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
duc van » duc va, duc tan, duc manh
han tri » han tai, van tri, chan troi
ma hoi » mai hoi, xa hoi, ma hoa
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ma hoi. hieu va chat duc van ((han tri) OR (thanh tri)) va thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ma hoi. hieu va chat duc van ((han tri) OR (thanh tri)) va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoi. hieu va chat duc van ((han tri) OR (thanh tri)) va thiet*.