Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
lang ha » long ha
lang xa » dang xay, lang van
sai ky » sac ky
luc va » tuc va, loc va
te sai » te tai, te bai, te lai

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

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