Perhaps you should try some spelling variations:
cau tren » dau tren, ca tren, cau treo
nhan duc » nhan duoc, nhan luc, phan duc
cu tren » tu tren, dua tren
hanh ke » hanh kem, thanh ke, hanh ky
va hanh » van hanh, va thanh, va danh
ve nhan » ve nha, de nhan, va nhan
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (nang x)) hoi. hieu ve nhan duc va hanh ke ((cau tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (nang x)) hoi. hieu ve nhan duc va hanh ke ((cau tren) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (nang x)) hoi. hieu ve nhan duc va hanh ke ((cau tren) or (cu tren))*.