Perhaps you should try some spelling variations:
lang hoa » hang hoa, lang ha, nang hoa
tu cach » tu cac
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
hieu va » lieu va, hieu qua
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky lang hoa hoi. hieu va cau luc va hanh vi ((cua tre) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky lang hoa hoi. hieu va cau luc va hanh vi ((cua tre) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky lang hoa hoi. hieu va cau luc va hanh vi ((cua tre) or (va thiet))*.