Perhaps you should try some spelling variations:
cham nuoc » tham nuoc, cham soc, pham ngoc
su triet » su viet, su tien, ve triet
hieu tuc » hieu thuc, hieu luc, hieu thuoc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
doi su » oi su, don su, voi su

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 nang ma hoi. hieu tuc ((cham nuoc) OR (nha nuoc)) ((va hanh) or (va danh)) doi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu tuc ((cham nuoc) OR (nha nuoc)) ((va hanh) OR (va danh)) doi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. hieu tuc ((cham nuoc) OR (nha nuoc)) ((va hanh) or (va danh)) doi su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu tuc ((cham nuoc) OR (nha nuoc)) ((va hanh) or (va danh)) doi su triet*.