Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
ve tai » te tai, de tai, le tai
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y lang xa hoi. hieu ((ve tai) or (va cac)) thuc van hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y lang xa hoi. hieu ((ve tai) OR (va cac)) thuc van hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: thu sach y lang xa hoi. hieu ((ve tai) or (va cac)) thuc van hanh vi cua tu*.