Perhaps you should try some spelling variations:
bang cau » hang cau, bang cac, nang cao
vai cua » dai cua, hai cua, lai cua
dao vai » dao van, dao va, dao bai
sach tu » sach thu, sach ty, sach uu
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cach tu » cach thuc
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc ((sach tu) OR (cach tu)) bang cau hoi. hieu ve cham ((luc va) or (tuc va)) dao vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((sach tu) OR (cach tu)) bang cau hoi. hieu ve cham ((luc va) OR (tuc va)) dao vai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc ((sach tu) OR (cach tu)) bang cau hoi. hieu ve cham ((luc va) or (tuc va)) dao vai cua tu*".