Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
nang cho » nang chon, ngang cho, nang cao
cho hoc » co hoc, khoa hoc
van cam » van nam, van lam, van cau
van dau » van dao, phan dau
xuc ban » duc ban, cuc ban, quoc ban
cuc tre » duc tre, cua tre, cuu tre
tu sac » tu sach, tu san, tu bac

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 cac)) ky nang cho hoc. hieu ((van cam) or (van dau)) xuc ban thanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky nang cho hoc. hieu ((van cam) OR (van dau)) xuc ban thanh tai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu cac)) ky nang cho hoc. hieu ((van cam) or (van dau)) xuc ban thanh tai cuc tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu cac)) ky nang cho hoc. hieu ((van cam) or (van dau)) xuc ban thanh tai cuc tre*.