Perhaps you should try some spelling variations:
dang xay » dang van
cam truc » cau truc, nam truc, lam truoc
truc van » truc va, thuc van, truc ban
van tuan » van quan, van ban, anh tuan
te sach » toc sach
sach so » mach so, sach lo, sach song
hieu ve » hieu va, hieu van
vai cua » hai cua, lai cua, bai cua
ve cam » ve cham, ve cac, va cam

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 so ((dang xay) OR (van xay)) hoi. hieu ve cam truc van tuan ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach so ((dang xay) OR (van xay)) hoi. hieu ve cam truc van tuan ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach so ((dang xay) OR (van xay)) hoi. hieu ve cam truc van tuan ((vai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach so ((dang xay) OR (van xay)) hoi. hieu ve cam truc van tuan ((vai cua) or (dai cua)) tre*.