Perhaps you should try some spelling variations:
trang hanh » trang anh, tang hanh, tran hanh
soc trang » hoc trong, hoc trung
dua tren » dung tren
tham soc » cham soc, tham nuoc, thai son
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
va tham » van tham, va cham, va thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((nang xa) OR (nang ma)) hoi. lieu va tham soc trang hanh vi ((cuu tre) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang ma)) hoi. lieu va tham soc trang hanh vi ((cuu tre) OR (dua tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) OR (nang ma)) hoi. lieu va tham soc trang hanh vi ((cuu tre) or (dua tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) OR (nang ma)) hoi. lieu va tham soc trang hanh vi ((cuu tre) or (dua tren))*.