Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cau tren » dau tren, ca tren, cau treo
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
va hanh » va thanh, va danh, ban hanh
cu tren » tu tren, dua tren
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
sach v » sach va, sach y, sach 2
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang

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 v nang ma hoi. hieu ve cham luc ((va hanh) or (van hanh)) ly ((cau tren) OR (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang ma hoi. hieu ve cham luc ((va hanh) OR (van hanh)) ly ((cau tren) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang ma hoi. hieu ve cham luc ((va hanh) or (van hanh)) ly ((cau tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: te sach v nang ma hoi. hieu ve cham luc ((va hanh) or (van hanh)) ly ((cau tren) OR (cu tren))*.