Perhaps you should try some spelling variations:
tai nang » thi nang, tai lang, dai nang
ban hanh » ban hang
tu sach » thu sach, te sach, tu cach
cao cuc » cao duc, cao suc, cho cuoc
doi cua » dai cua, hoi cua
cuc ban » cua ban, cac ban, cuu ban
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
su sach » so sach, vu sach
di cua » dai cua, de cua, do cua
va cao » va cac, va co, va dao

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)) tai nang cao hoi. hieu va cao cuc ban hanh ((di cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) tai nang cao hoi. hieu va cao cuc ban hanh ((di cua) OR (doi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) tai nang cao hoi. hieu va cao cuc ban hanh ((di cua) or (doi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) tai nang cao hoi. hieu va cao cuc ban hanh ((di cua) or (doi cua)) tre*.