Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
cua viet » ca viet, hoa viet, cua vat
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
tai cua » thai cua, tai cuc, tri cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa

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

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