Perhaps you should try some spelling variations:
qua tham » qua cham, qua than, qua thanh
thai cua » than cua, tai cuc, tri cua
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
tai cua » tai cuc, tri cua, dai cua
te sai » te tai, te bai, te lai
sai ky » sac ky
luc va » tuc va, loc 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 sai ky lang xa hoi. hieu qua tham ((luc va) or (duc va)) hanh ((tai cua) OR (thai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky lang xa hoi. hieu qua tham ((luc va) OR (duc va)) hanh ((tai cua) OR (thai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky lang xa hoi. hieu qua tham ((luc va) or (duc va)) hanh ((tai cua) OR (thai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sai ky lang xa hoi. hieu qua tham ((luc va) or (duc va)) hanh ((tai cua) OR (thai cua)) triet*.