Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cau treo » cau theo, cau tren, cau triet
van hac » van hoc, van ha, van hai
cua tre » cua te, cuu tre, cua triet
sach so » mach so, sach lo, sach song
so sach » so sanh, bo sach, co sach
thi van » thi lan, thi hanh, thi nang
lang xa » lang ha, dang xay, lang van
so lang » o lang, so dang, hoa lang
va hanh » van hanh, va thanh, va danh
hac tu » hoc tu, tac tu, cac tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach so lang xa hoi. thi van hac tu va hanh vi ((cua tre) or (((cau treo) or (su triet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach so lang xa hoi. thi van hac tu va hanh vi ((cua tre) OR (((cau treo) OR (su triet)))).
• Adding a wildcard symbol may retrieve word variants: so sach so lang xa hoi. thi van hac tu va hanh vi ((cua tre) or (((cau treo) or (su triet))))*.