Perhaps you should try some spelling variations:
van dang » van dong, van dung, van nang
qua cham » qua hai, qua cac, va cham
cham cuu » cap cuu, chat cua
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
va dang » va nang, va lang, da dang
xay hoi » xa hoi, tay hoi, cay phoi
va hanh » van hanh, va thanh, va danh
cuu va » cuu van, cuu ve
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: te sach ((va dang) OR (van dang)) xay hoi. hieu qua cham cuu va hanh dai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((va dang) OR (van dang)) xay hoi. hieu qua cham cuu va hanh dai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((va dang) OR (van dang)) xay hoi. hieu qua cham cuu va hanh dai ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te sach ((va dang) OR (van dang)) xay hoi. hieu qua cham cuu va hanh dai ((cua te) or (cua tu))*.