Perhaps you should try some spelling variations:
hieu sau » hieu su, hieu suat, tieu su
danh lai » danh sai, gianh lai, dinh lam
nhan tuc » nhan thuc, nhan luc, nhanh thuc
su sach » so sach, vu sach
va danh » va dinh, va dan, va hanh
lai cua » dai cua, hai cua, lai chau
hieu cu » hieu cua, hieu ca, hieu su
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
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 ((y nang) or (v nang)) xa hoi. ((hieu cu) or (hieu sau)) nhan tuc va danh lai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) xa hoi. ((hieu cu) OR (hieu sau)) nhan tuc va danh lai cua vat.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (v nang)) xa hoi. ((hieu cu) or (hieu sau)) nhan tuc va danh lai cua vat*.