Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach
va hanh » van hanh, va thanh, va danh
dai lao » dai lan, dai thao, dai luan
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vu sach » vu bach, vu khach
vai cua » dai cua, hai cua, lai cua
lao va » tao va, cao va, bao va

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 (vu sach)) ky ((nang xa) or (nang ma)) hoi. hieu hien dai lao va hanh vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky ((nang xa) OR (nang ma)) hoi. hieu hien dai lao va hanh vai cua vat.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky ((nang xa) or (nang ma)) hoi. hieu hien dai lao va hanh vai cua vat*.