Perhaps you should try some spelling variations:
tham lang » nham nang, pham hang, thai bang
tay tang » tay lang, tay trung, tay quang
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
cac cuu » cap cuu, cac cau, cac chu
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
ve cac » va cac, vien cac
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((tay tang) or (tham lang)) cho hoc. hieu ve cac cuu van hanh ((di cua) OR (de cua)) cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tay tang) OR (tham lang)) cho hoc. hieu ve cac cuu van hanh ((di cua) OR (de cua)) cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tay tang) or (tham lang)) cho hoc. hieu ve cac cuu van hanh ((di cua) OR (de cua)) cay*".