Perhaps you should try some spelling variations:
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
ve chao » ve chat, ve cham, ve cho
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
xu va » xu van, tu va, su va

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 y ((nang xa) or (nang ma)) hoi. hieu ve chao xu va hanh ((vai cuu) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang ma)) hoi. hieu ve chao xu va hanh ((vai cuu) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (nang ma)) hoi. hieu ve chao xu va hanh ((vai cuu) or (vai cua)) tre*.