Perhaps you should try some spelling variations:
trong van » trong cac
lang van » dang van, tang van, hoang van
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
cua viet » ca viet, hoa viet, cua vat
cau treo » cau theo, cau tren, cau triet
vu sach » vu bach, su sach, vu khach
va am » va lam, 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: vu sach y ((lang van) or (trong van)) hoi. lieu va am thuc dan hanh vi ((cua viet) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((lang van) OR (trong van)) hoi. lieu va am thuc dan hanh vi ((cua viet) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: vu sach y ((lang van) or (trong van)) hoi. lieu va am thuc dan hanh vi ((cua viet) or (cau treo))*.