Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
tai cuu » tai cuc, tai buu, tai cua
duc van » duc va, duc tan, duc manh
thu san » thuy san, thu ban, phu san
cac duc » cac du, cao duc, cac dac
nang ro » nang co, nang ho, nang ra
ve cac » va cac, vien cac
tu sac » tu sach, tu cac, tu bac
tu san » tu ban, tu can, vu san
ro lai » o lai, ho lai, ru lai

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

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