Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cham luc » cham soc, cham cuu, chat lua
va thanh » gia thanh, ban thanh, va tinh
nhan luc » nang luc
va hanh » van hanh, va danh, ban hanh
tu sach » thu sach, su sach, te sach
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach v nang x hoi. lieu va ((cham luc) OR (nhan luc)) ((va hanh) or (va thanh)) vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x hoi. lieu va ((cham luc) OR (nhan luc)) ((va hanh) OR (va thanh)) vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang x hoi. lieu va ((cham luc) OR (nhan luc)) ((va hanh) or (va thanh)) vi cau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang x hoi. lieu va ((cham luc) OR (nhan luc)) ((va hanh) or (va thanh)) vi cau tren*.