Perhaps you should try some spelling variations:
truc ban » thuc ban, truc dan, truc van
ban hanh » ban hang
cac truc » cau truc, cac tru, cac trung
cuu tre » cau tren, cau treo
lang xa » dang xay, lang van
cua tre » cua te, cua triet, dua tren
lang ha » long ha
hanh de » hanh ve, hanh kem
hieu ve » hieu va, hieu van
te sai » te tai, te bai, te lai
sai ky » sac ky
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky ((lang xa) or (lang ha)) hoi. hieu ve cac truc ban hanh de ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky ((lang xa) OR (lang ha)) hoi. hieu ve cac truc ban hanh de ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sai ky ((lang xa) or (lang ha)) hoi. hieu ve cac truc ban hanh de ((cua tre) or (cuu tre))*.