Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cham luc » cham soc, nhan luc, cham cuu
cau tren » cu tren, dau tren, ca tren
nang co » nang cao, nang doc, nang noi
va cham » va chat, va tham
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
nang o » nang ho, nang ro, nang x
vi cau » va cau, ve cau, di cau

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 ((nang o) or (nang co)) hoi. lieu va cham luc ((va hanh) OR (va danh)) vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang o) OR (nang co)) hoi. lieu va cham luc ((va hanh) OR (va danh)) vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y ((nang o) or (nang co)) hoi. lieu va cham luc ((va hanh) OR (va danh)) vi cau tren".
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang o) or (nang co)) hoi. lieu va cham luc ((va hanh) OR (va danh)) vi cau tren*.