Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
nham thuc » nhan thuc, nam thuc, nham thu
cham tuc » pham thuc, tham thuc, cham soc
va thanh » gia thanh, ban thanh, va tinh
phan ca » phan cac, phan cau, phan cam
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ca tren » cau tren, cu tren, la tren

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 y ((nang xa) OR (nang x)) hoi. hieu ve ((cham tuc) or (nham thuc)) va thanh phan ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. hieu ve ((cham tuc) OR (nham thuc)) va thanh phan ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) OR (nang x)) hoi. hieu ve ((cham tuc) or (nham thuc)) va thanh phan ca tren".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) OR (nang x)) hoi. hieu ve ((cham tuc) or (nham thuc)) va thanh phan ca tren*.