Perhaps you should try some spelling variations:
hieu sau » hieu su, hieu suat, tieu su
nang tao » nang cao, sang tao, nang tai
thanh vi » hanh vi, thanh va, thanh ve
tao hoi » tao khoi, tao boi, tay hoi
hieu so » thieu so
vi cua » vai cua, di cua
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
cua te » cua tu
xu va » xu van, su va, vu va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang tao hoi. ((hieu so) or (hieu sau)) chao ((xu va) or (tu va)) thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang tao hoi. ((hieu so) OR (hieu sau)) chao ((xu va) OR (tu va)) thanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu san ky nang tao hoi. ((hieu so) or (hieu sau)) chao ((xu va) or (tu va)) thanh vi cua te*.