Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
te cach » ve cach, te sach, tu cach
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
tu nano » truc nano
tu nang » tru nang, tu nong, tu lang
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cach ((tu nang) OR (tu nano)) cho hoc. hieu ve cac xuc ((van hanh) or (ban hanh)) vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cach ((tu nang) OR (tu nano)) cho hoc. hieu ve cac xuc ((van hanh) OR (ban hanh)) vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cach ((tu nang) OR (tu nano)) cho hoc. hieu ve cac xuc ((van hanh) or (ban hanh)) vi cua cau*".