Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh tai » thanh tai, hang tai, han tai
cham cuu » cap cuu, chat cua
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ban ky » van ky, dan ky
bai ky » sai ky, bac ky, dai ky
cuu va » cuu van, cuu ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((bai ky) OR (ban ky)) lang xa hoi. hieu va cham cuu va hanh tai ((cua tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((bai ky) OR (ban ky)) lang xa hoi. hieu va cham cuu va hanh tai ((cua tre) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((bai ky) OR (ban ky)) lang xa hoi. hieu va cham cuu va hanh tai ((cua tre) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: te ((bai ky) OR (ban ky)) lang xa hoi. hieu va cham cuu va hanh tai ((cua tre) or (ve triet))*.