Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cau theo » cau thi
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
cam tuc » cam xuc, cam tu, nam thuc
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, tuc xa

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) or (thuoc sach)) ky nang xa hoi. hieu van cam tuc va danh di ((cau theo) OR (cau tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuoc sach)) ky nang xa hoi. hieu van cam tuc va danh di ((cau theo) OR (cau tao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thuoc sach)) ky nang xa hoi. hieu van cam tuc va danh di ((cau theo) OR (cau tao))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuoc sach)) ky nang xa hoi. hieu van cam tuc va danh di ((cau theo) OR (cau tao))*.