Perhaps you should try some spelling variations:
tu lang » cu lang, tu lanh, xu lang
lang ky » dang ky, tang ky, bang ky
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
hieu te » hieu ve, hien te, hieu he
va hanh » van hanh, va thanh, va danh
vi cua » vai cua
di cua » dai cua, doi cua, de cua
nuoc » quoc, duoc, ngoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu lang ky ((lang xa) or (nang ma)) hoi. hieu te hoc nuoc va hanh ((vi cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu lang ky ((lang xa) OR (nang ma)) hoi. hieu te hoc nuoc va hanh ((vi cua) OR (di cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu lang ky ((lang xa) or (nang ma)) hoi. hieu te hoc nuoc va hanh ((vi cua) or (di cua)) tre*.