Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cau treo » cau theo, cau triet, cau trieu
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
toc sac » toc sach, toc san, hoc sach
nang ma » tang ma, sang ma, nang cao
ve cau » va cau, ve cac, le cau
sac ky » cac ky, sai ky
ke cau » ket cau
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang ma hoi. hieu ((ve cau) or (ke cau)) tao va danh vi ((cau treo) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang ma hoi. hieu ((ve cau) OR (ke cau)) tao va danh vi ((cau treo) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang ma hoi. hieu ((ve cau) or (ke cau)) tao va danh vi ((cau treo) or (cau tren))*.