Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
dinh cuu » dinh chi
va thanh » gia thanh, ban thanh, va tinh
va tham » van tham, va cham, va thuat
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
vi cuu » vi luu, vinh cuu
te sac » 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 (te sach)) ky tang xa hoi. hieu va tham nuoc va thanh ((vi cuu) or (dinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky tang xa hoi. hieu va tham nuoc va thanh ((vi cuu) OR (dinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky tang xa hoi. hieu va tham nuoc va thanh ((vi cuu) or (dinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky tang xa hoi. hieu va tham nuoc va thanh ((vi cuu) or (dinh cuu)) tre*.