Perhaps you should try some spelling variations:
lang khoa » hang khoa, dang khoa, long khoa
hanh hai » thanh hai, nhanh hai, hang hai
khoa hoi » khoan hoi, khoa hoc, khoa doi
vu sach » su sach, vu khach
cac xuc » cam xuc, cac nuoc, chat xuc
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
thi van » thi lan, thi hanh, thi nang
xuc va » duc va, tuc va, luc va
cua te » cua tu
y lang » o lang, _ lang, tay lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu bach)) y lang khoa hoi. ((thien van) or (thi van)) cac xuc va hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) y lang khoa hoi. ((thien van) OR (thi van)) cac xuc va hanh hai cua te.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu bach)) y lang khoa hoi. ((thien van) or (thi van)) cac xuc va hanh hai cua te*.