Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
van nhanh » van thanh, van hanh, van khanh
tu sach » thu sach, te sach, tu cach
hai cua » thai cua, dai cua, hoi cua
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
lo nang » ho nang, ly nang, loai nang
so sach » so sanh, bo sach, co sach
su sach » vu sach
cua tu » cua tuc, cua su, cua cu

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) or (((su sach) OR (so sach)))) lo nang xa hoi. hieu va cac duc van nhanh hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (((su sach) OR (so sach)))) lo nang xa hoi. hieu va cac duc van nhanh hai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (((su sach) OR (so sach)))) lo nang xa hoi. hieu va cac duc van nhanh hai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((su sach) OR (so sach)))) lo nang xa hoi. hieu va cac duc van nhanh hai cua tu*.