Perhaps you should try some spelling variations:
thay nuoc » tham nuoc, tray nuoc, thoat nuoc
dua tren » dung tren
thai son » thai den, thai do, thai hoc
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
te sach » toc sach
lang xa » lang ha, dang xay, lang van
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: te sach y lang xa hoi. hieu van ((thay nuoc) or (thai son)) va hanh vi ((cuu tre) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang xa hoi. hieu van ((thay nuoc) OR (thai son)) va hanh vi ((cuu tre) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. hieu van ((thay nuoc) or (thai son)) va hanh vi ((cuu tre) or (dua tren))*.