Perhaps you should try some spelling variations:
cham truc » cau truc, pham thuc, nam truc
nham thuc » nhan thuc, nam thuc, nham thu
va trien » va truyen, va thiet, va tuyen
phan lap » phan dau
van phan » van phong, van thanh, luan phan
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
hieu vu » hieu va, hieu ve, hieu su
nang co » nang cao, nang doc, nang noi
nang ho » nang hoc, tang ho, nang cao
lap va » tap va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((nang ho) or (nang co)) hoi. hieu vu ((cham truc) or (nham thuc)) van phan lap va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang ho) OR (nang co)) hoi. hieu vu ((cham truc) OR (nham thuc)) van phan lap va trien.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang ho) or (nang co)) hoi. hieu vu ((cham truc) or (nham thuc)) van phan lap va trien*.