Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
lang van » dang van, tang van, hoang van
thanh ve » hanh ve, thanh va, thanh vien
thu sach » thuat sach, thuoc sach, thu hoach
tuc ban » thuc ban, truc ban, tu ban
cam tuc » cam xuc, cam tu, nam thuc
qua cam » qua cham, qua cac, qua ca
tu sach » su sach, te sach, tu cach
lang xa » lang ha, dang xay
ve cua » le cua, de cua, te cua

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 (thu sach)) phu ((lang xa) OR (lang van)) hoi. hieu qua cam tuc ban thanh ve cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) phu ((lang xa) OR (lang van)) hoi. hieu qua cam tuc ban thanh ve cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) phu ((lang xa) OR (lang van)) hoi. hieu qua cam tuc ban thanh ve cua vat*".