Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cau treo » cau theo, cau tren, cau triet
cham luc » cham soc, nhan luc, cham cuu
dau tren » dau tien, dat tren, dau tieng
dang xay » dang van, van xay
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
lang xa » lang ha, lang van
va cham » va chat, va tham
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y ((lang xa) or (dang xay)) hoi. lieu va cham luc va hanh va ((cau treo) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((lang xa) OR (dang xay)) hoi. lieu va cham luc va hanh va ((cau treo) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((lang xa) or (dang xay)) hoi. lieu va cham luc va hanh va ((cau treo) or (dau tren))*.