Perhaps you should try some spelling variations:
cham nuoc » tham nuoc, nha nuoc, cham soc
hieu tuc » hieu thuc, hieu luc, hieu thuoc
tuc cham » toc cham, tu cham, phuc cham
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
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 ((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 ((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 ((va hanh) or (va danh)) doi su triet*.