Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
hang xa » hoang xa, hang ca, lang xa
hieu ve » hieu va, hieu van
ve chao » ve chat, ve cham, ve cho
xu van » tu van, vu van, su van
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty ((hang xa) or (hang va)) hoi. hieu ve chao xu van hanh ((vi cua) OR (di cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty ((hang xa) OR (hang va)) hoi. hieu ve chao xu van hanh ((vi cua) OR (di cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty ((hang xa) or (hang va)) hoi. hieu ve chao xu van hanh ((vi cua) OR (di cua)) te*".