Perhaps you should try some spelling variations:
tai khoa » da khoa, noi khoa
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
phat xuc » phat xuat, phap xu, phat huy
hieu va » lieu va, hieu qua
dang ha » dong ha, dung ha, tang ha
lang ha » long ha
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu tai khoa ((dang ha) or (lang ha)) hoi. hieu va ((phat xuc) OR (chat xuc)) van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tai khoa ((dang ha) OR (lang ha)) hoi. hieu va ((phat xuc) OR (chat xuc)) van hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu tai khoa ((dang ha) or (lang ha)) hoi. hieu va ((phat xuc) OR (chat xuc)) van hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu tai khoa ((dang ha) or (lang ha)) hoi. hieu va ((phat xuc) OR (chat xuc)) van hanh vi cuu tre*.