Perhaps you should try some spelling variations:
tai khoa » da khoa, noi khoa
dang khi » dang khoi, dang khai, dang thi
cua tre » cua te, cuu tre, cua triet
khi cua » chi cua, thai cua
va dang » van dang, va nang, va lang
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
sai kho » dai kho, dai khoa, mai khoa
tang xa » trang xa, tang ma, tang ha
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sai kho) OR (tai khoa)) ((tang xa) or (lang xa)) hoi. hieu ve cam duc va dang khi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sai kho) OR (tai khoa)) ((tang xa) OR (lang xa)) hoi. hieu ve cam duc va dang khi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sai kho) OR (tai khoa)) ((tang xa) or (lang xa)) hoi. hieu ve cam duc va dang khi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sai kho) OR (tai khoa)) ((tang xa) or (lang xa)) hoi. hieu ve cam duc va dang khi cua tre*.