Perhaps you should try some spelling variations:
nang cac » nang cao, bang cac, hang cac
cac khoi » cac thoi, cac khoan, cach thoi
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
ban hanh » ban hang
cau tren » cu tren, ca tren, cau treo
dau tren » dau tien, dat tren, dau tieng
te sach » toc sach
duc ban » duc tan, duc van, dua ban
hanh de » hanh ve, hanh kem
y nang » ky nang, ly nang, v 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 y nang cac khoi. hieu van pham duc ban hanh de ((cau tren) OR (dau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang cac khoi. hieu van pham duc ban hanh de ((cau tren) OR (dau tren))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang cac khoi. hieu van pham duc ban hanh de ((cau tren) OR (dau tren))*.