Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hanh tai » hang tai, han tai, hinh tai
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
cuc tre » duc tre, cua tre, cuu tre
tu sai » tu bai, tu cai, tu lai
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sai) OR (tu san)) ky nang xa hoi. hieu va cac duc va ((hanh tai) or (thanh tai)) cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu san)) ky nang xa hoi. hieu va cac duc va ((hanh tai) OR (thanh tai)) cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu san)) ky nang xa hoi. hieu va cac duc va ((hanh tai) or (thanh tai)) cuc tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu san)) ky nang xa hoi. hieu va cac duc va ((hanh tai) or (thanh tai)) cuc tre*.