Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
tham thuc » pham thuc, tam thuc, thai thuc
nang tai » hang tai, tang tai, sang tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
tai hoi » tai khoi, dai hoi, tai hai
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua te » cua tu

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 tai hoi. lieu va ((tham thuc) or (nham thuc)) ((va hanh) OR (va danh)) dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang tai hoi. lieu va ((tham thuc) OR (nham thuc)) ((va hanh) OR (va danh)) dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang tai hoi. lieu va ((tham thuc) or (nham thuc)) ((va hanh) OR (va danh)) dai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang tai hoi. lieu va ((tham thuc) or (nham thuc)) ((va hanh) OR (va danh)) dai cua te*.