Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
hieu va » lieu va, hieu qua
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
va cam » va cham, va cac, va cao
ha hoi » hoa hoi, ha noi, xa hoi
te sac » 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) or (te sach)) ky lang ha hoi. hieu va cam duc van hanh tai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky lang ha hoi. hieu va cam duc van hanh tai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky lang ha hoi. hieu va cam duc van hanh tai ((cua triet) or (cua viet))*.