Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
cau treo » cau tren, cau triet, cau trieu
tang mai » tang ma, tang tai, lang mai
va thanh » gia thanh, ban thanh, va tinh
cao suc » cao su, cao duc
va hanh » van hanh, va danh, ban hanh
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
ky tang » ky nang, ky dang, kho tang
va cao » va cac, va co, va dao
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky tang mai hoi. hieu va cao suc ((va hanh) or (va thanh)) di ((cau treo) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang mai hoi. hieu va cao suc ((va hanh) OR (va thanh)) di ((cau treo) OR (cau theo)).
• Adding a wildcard symbol may retrieve word variants: te sac ky tang mai hoi. hieu va cao suc ((va hanh) or (va thanh)) di ((cau treo) or (cau theo))*.