Perhaps you should try some spelling variations:
than cua » nhan cua, ban cua, gian cua
thai cua » tai cuc, tri cua, dai cua
va lang » va nang, hoa lang
cac luc » cau luc, coc luc, cac nuoc
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
luc va » duc va, tuc va, loc va
tu san » thu san, tu ban, tu can
te sac » te sach, te cac, te san

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) or (tu san)) ky tang xa hoi. hieu va cac luc va lang ((thai cua) OR (than cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (tu san)) ky tang xa hoi. hieu va cac luc va lang ((thai cua) OR (than cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (tu san)) ky tang xa hoi. hieu va cac luc va lang ((thai cua) OR (than cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (tu san)) ky tang xa hoi. hieu va cac luc va lang ((thai cua) OR (than cua)) tre*.