Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau tren » cu tren, dau tren, ca tren
ky lang » ky dang, ky tang, tay lang
van hoi » van hoa, van hoc, van hoe
hieu va » lieu va, hieu qua
va thai » van thai, va tai, va tham
thai do » thay doi, thai den
va hanh » van hanh, va thanh, va danh
te van » le van, te va, ve van
do va » do van, so va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te van ((ky lang) or (ky nang)) van hoi. hieu va thai do va hanh vi ((cau tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te van ((ky lang) OR (ky nang)) van hoi. hieu va thai do va hanh vi ((cau tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te van ((ky lang) or (ky nang)) van hoi. hieu va thai do va hanh vi ((cau tren) or (cua triet))*.