Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
cua te » cua tu

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 ty ((nang xa) OR (nang ma)) hoi. hieu ((ve cam) or (va cam)) duc va danh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (nang ma)) hoi. hieu ((ve cam) OR (va cam)) duc va danh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) OR (nang ma)) hoi. hieu ((ve cam) or (va cam)) duc va danh vai cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) OR (nang ma)) hoi. hieu ((ve cam) or (va cam)) duc va danh vai cua te*.